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Coaches:
Matt Warshaw—Director
South Coast Aquatics Director Matt Warshaw is a Thousand Oaks native, South Coast alumnus, and graduate of Thousand Oaks High School, where he competed as a varsity water polo player and team captain. Matt's coaching experience includes a season with the Newbury Park High School program before founding the Golden Bay Water Polo Club in 2001. Golden Bay began as a youth program, with just nine athletes, but quickly grew to be among the most competitive programs in Ventura County. The Golden Bay program merged with the South Coast Water Polo Club in 2003, and expanded to include programs for four separate age divisions, including high school. In 2004, Matt added a swim program to the South Coast catalog. In 2017 South Coast took over the Malibu Water Polo Foundation at Malibu High School & in 2019 they merged with the Titan Water Polo Club.

Over the years, the South Coast Water Polo Club has achieved tremendous success throughout California and Hawaii, including a Bronze Medal at the 2008 Junior Olympics (14 & Under Boys), 6 San Diego County Cup medals, a Hawaiian Invitational championship (2004) and runner-up finish (2006), and a top-20 finish at the 2006 Junior Olympics for the boys (15th place) and girls (29th place) teams. At the 2010 Junior Olympics, South Coast placed 10th in the 14 & Under Boys Platinum Bracket; and 5th in the 14 & Under Girls Gold Bracket. At the 2011 Junior Olympics South Coast was represented with eight teams across the age groups, the 16U boys finishing a club best 10th in the platinum bracket. In 2012 South Coast qualified nine teams, including a silver medal finish with the 18U boys. With more than 300 current members, South Coast is proud to boast nearly 3,000 alumni athletes, including many NCAA Division I, II, and III players; and continues to thrive as the third oldest club water polo program in the state of California.

In addition to his work with the South Coast program, Matt holds a B.A. in Communication Studies from Cal State University Northridge (CSUN), where he is also the head coach for the Division I women's water polo team since 2016. Prior to his work with the Matadors, Matt spent 12 years as an assistant coach for the men's and women's water polo teams at California Lutheran University, which celebrated Women's Division III National Championships in 2007 and 2010. From 2012-2015 Matt joined the Olympic Development staff as an assistant coach for the 10th/12th grade and under boys in the Coastal California Zone.

Jason Rosenthal—12U, 14U Girls and Girls Director
A 32-year coaching veteran, Coach Jason served as the girls Head Coach for 26 years and the Boys' Head coach from 1992-2003 & 2014 and led the boys' program to four Marmonte League Championships in 1994, 1998, 2002 and 2014 as well as 12 straight playoff appearances. In 1996 Jason helped to form the first ever girls water polo team at AHS. From 1996-2022 he led them to 22 Marmonte league titles, 6 CIF Championship Finals, 2 CIF Titles and has won a CIF record 170 (and counting) consecutive league games.

  • Marmonte League Boys Coach of the Year- 1994, 1997, 1998, 2002, 2014
  • Marmonte League Girls Coach of the Year- 1999-2003, 2005-2017, 2022.
  • Coastal Canyon League Girls Coach of the Year- 2019, 2020
  • CIF Coach of the Year- 2000, 2001, 2006, 2007, 2022
  • Los Angeles Daily News Coach of the Year- 1998, 2002- for Boys Team
  • Los Angeles Daily News Coach of the Year- 1998, 2000, 2001, 2002, 2006, 2007, 2008 for girls team

During his 26 seasons as Agoura High School Girls head coach, Jason complied an overall record of 537-214 and a league record of 226-8. Jason formerly headed the HS Girls Program at Los Angeles Water Polo Club. He has also been involved with the National Youth Program. From 1999-2004 & 2020-Present he coached the youth zone team for our area. Born and raised in the area Jason is a member of the local community living in Moorpark with his wife and two daughters ages 9 and 11.
Derek Allen—12U & 14U Boys
Derek Allen started his water polo career at Bishop Alemany High School in 2015. In his freshman year, he started as a center on Junior Varsity where he received the most improved player award. In his Sophomore year at Alemany, he became a starter on the varsity team where he received the first of his varsity letters. For his Junior and senior years he transferred to Agoura High School. Going into his senior year he started as the center and helped bring the team to the CIF playoffs. For three years he played with the Los Angeles Water Polo Club as a center going to Junior Olympics all three years. Once completing his high school career Derek went on to compete at La Salle University. Taking a year off because of Covid he went on to play at Los Angeles Valley College where he played for another year and then decided to begin coaching. He started working at his local pool and began his coaching career with an intro class in Simi Valley for 14U. Derek is currently studying at Moorpark College seeking a degree in Kinesiology to go into the field of Sports Medicine.
Trevor Campbell—12U & 14U Boy
Trevor Campbell has been playing water polo and swimming since 2012. He is a left-handed attacker who has played four years of water polo for the 2013-2015 Marmonte League Champions, Agoura High School. Trevor was a starter for three out of the four years and was the team captain his senior year. Trevor also excelled on the Agoura High School Swim Team.  Aside from his high school competition, Coach Campbell played four years for Los Angeles Water Polo Club, where he was a starter for three of the four years and went to Junior Olympics all four years, playing in Platinum his last two years. Later, Trevor went to California Baptist University for a year and red-shirted for their water polo team. He then transferred to CLU where he competed on the men's water polo team and earned a degree in Kinesiology with a final goal of becoming a Physical Therapist. In addition to his South Coast duties Trevor is an assistant coach at Westlake High School for the boys water polo program.

Jens Cole—16U & 18U Girls
Jens has been playing water polo since the age of 11, getting his introduction and early exposure to the sport by Malibu Youth Water Polo Foundation. Under the coaching of current South Coast coach Hayden Goldberg and legendary Malibu High School head coach Mike Mulligan, Jens fueled a love and passion for the sport early on. He played high school water polo at Malibu High School, where he played Varsity all four years. At his time at MHS, he surpassed the all-time assist record, was awarded team MVP, was selected to All-Tri Valley League first team, first-team All-Ventura County tournament team, and Southern California All-Star team. He won league titles with his team In 2011, 2012, and 2013. In 2013, his senior year, the team went 30-1 and finished CIFSS Runner-Up. Academically, Jens was a four-year honor roll member and a California Scholarship Foundation member all four years as well.

His club water polo experience included five years with South Coast and most notably, winning a Gold in the Championship Gold Division at JO’s in 18U. His senior year, Jens was selected to the ODP Coastal Zone team and would later commit to play DI Water Polo at Pepperdine University. Being a member of the team for 5 years, Jens finished with a BA in Political Science and a Masters in Alternative Dispute Resolution. He finished as an Academic All-American all four years and completed his goal of competing at the highest level. In his current coaching roles, Jens is the Program Director & Head Coach for Boys (DI) and Girls (DII) Water Polo at Westlake High School alongside Coach Xavier, Coach Trevor, Coach Bailey, and Coach Eli.

In addition, Jens is a member of the ODP Coastal Zone Cadet Level Girls Coaching Staff and is entering his sixth year of coaching with South Coast Aquatics, where he and his athletes have secured 2nd place (2019) and 3rd place (2021) in JO’s Classic Silver Division, and a Top 20 finish in the Championship Platinum Division (2023). Jens is proud to have helped his student-athletes chase their goals and commit to play at the likes of Indiana, Long Beach, Stanford, Marist, Chapman, CLU, Redlands, Whittier, & others. His love for the game, passion for supporting young athletes, and focus on building up the level of the sport in the area, continues to fuel his coaching journey.
Kaitlin Gardhouse—16U & 18U Girls
Kaitlin Gardhouse started playing water polo at the age of 12. She played for Agoura High School where she was a 4-year Varsity Water Polo player. During her time at Agoura High School, she was a 3 time USA Water Polo Academic All American. She was named to the 2016, 2017, and 2018 All-Marmonte League first team, 2016, 2017 and 2018 second team All-CIF, 2018 VC Star All County Girls Water Polo first team, 2018 AHS Defensive Player of the Year, 2018 Agoura High School Winter Athlete of the Year, contributed to AHS being 2015, 2016, 2017 and 2018 Marmonte League Champions, and 2018 AHS captain. Kaitlin earned a degree in Biology from California Lutheran University in 2022 where she was a four year starter, named to the SCIAC All-Conference team and earned All-American honors.
Hayden GOldberg Hayden Goldberg—16U & 18U Boys
Hayden was a three-year varsity water polo player and swimmer at Malibu High School, where he earned 1st team all-league honors MVP awards. He helped lead the Sharks to CIF playoff appearances each year, and qualified as a CIF swimming finalist. Hayden went on to compete with the Ventura College water polo program, helping his team to reach the conference finals.

As a coach, Hayden has spent the last 15 years as head coach of the Malibu Youth Water Polo Club. He currently coaches at Malibu High School as the head coach for the Malibu High School Boys and Girls polo team. In his coaching at Malibu he has made a combined five appearances in CIF finals. In 2013 Hayden coached the Malibu 16U boys team to a 5th place finish at the Junior Olympics. In 2014 Malibu won their first CIF title. 2016 Hayden's Southcoast 16u won 5th in the Gold Division.

Jaeger Gonzales, Goalie Coach
Bio coming soon.
Elijah Graves—16U & 18U Girls
Elijah started playing water polo for Agoura the summer going into his freshman year, 2013. Elijah also played for the Los Angeles Water Polo club and was a center on teams that won gold in the 16U gold division, placing 6th in the 16U platinum division, and 7th in the 18U platinum division. After graduating, he continued to play at Santa Monica College for the 2018-2019 seasons, where he broke the all-time records for steals, goals, and assists. Achieving Western State Conference 1st team and MVP two years in a row inspired Elijah to keep pursuing a water polo career leading him to play Division 1 at California State University of Long Beach. At Long Beach, he started as a 1-2 side attacker and post-up player, helping the team to the finals of the Gold Coast Conference. After losing his senior year of play to the pandemic, He graduated with a degree in environmental science and policy.
Austin Gregory—16U & 18U Girls
Austin originally planned to be a two-sport athlete in high school playing water polo and volleyball but water polo pulled him away before volleyball even began. Austin was a two-time team captain at Thousand Oaks High School. In his senior season, he went on to break the school record for steals in a single season. Due to a back injury from his senior season, Austin then decided to begin coaching rather than continue his playing career as he became the varsity assistant, frosh/soph head coach, and goalie coach at his alma mater. Following his first year, Austin decided to focus on his next three years of being a student at Cal Lutheran in his pursuit of becoming a sports broadcaster. In May of 2022, Austin graduated Magna Cum Laude with a B.A. in Sports Communication and a minor in Sports Management from Cal Lutheran. Following his graduation, Austin accepted an offer to become the JV Boys Head Coach back at TOHS. He is the current assistant coach at Thousand Oaks HS for the girls water polo program and has aspirations to one day lead a high school program.
Lincoln Hall—12U & 14U Girls
Lincoln began water polo at eight years old and started swimming competitively at fourteen. He attended Camarillo High School where he was a two-time MVP and 4-year scholar athlete,2nd team All-County, 1st team All-CIF and a team captain in his junior and senior seasons on the water polo team. Also competing for the swim team, he is the 100 breastroke school record holder and also a member of the 200 medley relay team that holds the school record. Lincoln was a member of many South Coast teams from 2017-2021, capturing a gold medal at the 2021 Junior Olympics in the gold division. He now attends Cal Lutheran University where he competes on both the water polo and swim teams and is majoring in Sports Management with aspirations to become an athletic director following college.
Chet Hardy—14U & 16U Boys
Chet Hardy first began to play water polo in 7th grade for the Titan Water Polo Club at Rio Mesa High School. He then competed all four years at Camarillo High school where as a sophomore on the Varsity team, Chet was awarded Second Team All-League honors. His junior year, he achieved First Team All-League and was named Camarillo MVP. In his senior campaign he was the team captain and helped lead the team to the first league championship in school history. In addition to water polo Chet was also a four-year member of the Camarillo swim team. Following high school, Chet went earned a Bachelors Degree in History while also coaching for Gold Coast Water Polo Club. Chet was the lead coach for the 14U girls team at the 2019 Junior Olympics. Chet has also coached basketball at Oxnard High School and Rio Del Valle Middle School. In addition to his South Coast role Chet is the head boys and girls water polo coach at Newbury Park High School. 
Cole Ivie—12U & 14U Boys
Cole Ivie started playing water polo as a freshman at Agoura High School and quickly found his passion as a goalkeeper. Cole played for the Los Angeles Water Polo Club, where he started for four years and played at the Junior Olympics. After graduating high school, Cole played Division 3 water polo at Occidental College, where he helped lead the team to become the 2nd ranked team in the SCIAC Conference. He began his coaching career in 2021 as an assistant/goalie coach for the women’s water polo program at Mayfield Senior School. After four years as a student-athlete, Cole graduated from Occidental in 2023 with a degree in Biology. He is currently seeking acceptance into several graduate programs to achieve his master’s degree in biology. In addition to coaching at South Coast, Cole is working as an intern for the National Park Service in Thousand Oaks, where he conducts biological research in the Santa Monica Mountains National Recreation Area.
Laura Lopez—16U & 18U Girls
Laura Lopez is the head coach at Harvard Westlake for girls water polo. She started playing water polo on the Commerce club team at eight years old. She then went on to play in two Junior Pan-American games as part of the US National Youth and Junior teams. After these accomplishments, Coach Lopez played in college at LMU, where she helped her team win 3 conference titles. After graduating from LMU, she played professionally in Messina, Italy and began her coaching career upon her return. Coach Lopez previously coached at Whittier College and UC Santa Barbara. Prior to Harvard Westlake, she was the head girls aquatics coach at Herbert Hoover High School and a Math teacher for four years.
Anais Mathes—12U & 14U Girls
Mathes joins the South Coast staff after a stint with the Santa Cruz Water Polo Club as a youth girls coach. Previously, Mathes played professional water polo beginning in 2020 with the Lille Metropolitan Water Polo Club in Lille, France. Mathes played collegiate water polo at Marist College from 2017-20, helping the team post three 20-win seasons. In 125 career matches, Mathes registered 186 points, 123 goals, 63 assists and 56 steals. She scored a career-high 45 goals to go with 20 assists in her junior season. As a senior, Mathes would receive ACWPC All-America Honorable Mention accolades along with MAAC Preseason Co-Player of the Year recognition. She would finish the shortened 2020 campaign with 22 goals. Originally from San Diego, Mathes prepped at Torrey Pines High School where she played water polo all four years. She served as team captain in each of her last two years and would be named the team's Most Valuable Player from 2014-16. Mathes was also a first-team All-Division and first-team all-league selection with Torrey Pines. In addition to Anais position with South Coast she is an assistant coach at California State University Northridge for the D1 women's water polo team.
Andrew Maitam—16U & 18U Girls
Andrew Maitam started playing water polo at the age of thirteen at Calabasas High School. He became a three-year varsity starter where he was a 2-time all-league selection, 2-time scoring leader, MVP, team captain, and record holder for goals in a game (11). He played club water polo for Bruins WPC where he competed in multiple Junior Olympic and Futures competitions. In addition to water polo he was also a three-time letter winner and 2-time all-league selection in swimming. Andrew started coaching water polo shortly after graduating from CHS in 2017. He has been directly involved with both the boys and girls programs at Calabasas High since 2018, where he has either served as an assistant or a head coach. He held the position of head 18U girls coach at SFV water polo from 2019-2021 before joining the South Coast staff in 2022. Andrew received his BA and teaching credential in English Language Arts from Pepperdine University in 2022.
Ricky Mulcahey—10U & 12U Boys
Ricky started his water polo career at Crescenta Valley High School, where is was named First-Team All-Pacific League and MVP three consecutive years. He then went on to compete at Los Angeles Valley College where he was named First-Team all-conference in his sophomore year. From there he attended Cal Lutheran where he was a two-year starter in his junior and senior seasons and completed a degree in Exercise Science and Sports Medicine. Ricky began coaching for South Coast in 2009, taking multiple teams to Junior Olympics through the years. Ricky started coaching at Crescenta Valley High Schol in 2014 and was named coach of the year in 2014, 2015, 2016 & 2017 with Pacific League titles in 2014, 2015 and 2016. Ricky is now a PE teacher at Fremont and Muir Elementary School and lives in Fillmore with his wife and daughter.

Backus Nahas—16U & 18U Boys
Backus started playing water polo at the age of 14 at Porterville High School, continuing on at Ventura College and Master’s programs. Four of his years in Master’s he played under USA Water Polo Hall of Fame coach Sandy Nitta at Team Vegas/Henderson Water Polo Club. He has coached youth sports since 1997 including water polo, basketball, baseball, MMA and soccer. Backus has a strong focus on fundamentals, positive attitude and teamwork to help inspire young athletes to achieve their goals in sports. In addition, Backus owns a family farming operation that grows and markets strawberries and enjoys spending quality family time with his wife Kamala and their three children Asha, Sassin and Samir.
Greg Olsen—16U & 18U Boys
Greg Olsen started playing water polo his freshman year of high school. He attended Thousand Oaks High School where he was a three year varsity member and an MVP his senior year. He obtained All-CIF, Ventura County Players of the Year and First Team All-Marmonte League accolades, while setting the school record for assists. Greg played with South Coast throughout high school where he won a gold medal in the 2021 Junior Olympics in the gold division. In addition to his South Coast duties he is currently coaching at Newbury Park High School and is attending California Lutheran University and majoring in Business administration.
Mike Potter—14U & 16U Boys
Michael Potter began his water polo career at age 11 with South Coast Aquatics. He went on to compete at Thousand Oaks HS where he was a three year varsity letter award winner, leading the Lancers to the semi finals in CIF his senior year, along with MVP honors and a 1st team CIF selection. Michael then attended California Lutheran University where he was a four-year member of the swim and water polo teams. He graduated with a BA in Criminal Justice and is currently pursing a career in law enforcement. He enjoys training and competing in open water swimming.
Ryan Prem—12U & 14U Girls
Ryan Prem started playing water polo at age 11 beginning with Simi Water Polo. He went on to play for Royal High School, where he was a three year varsity letter for both water polo and swimming. He specialized at center defense as well as being a left handed attacker in water polo. For swimming, his events were 500 yard freestyle and 100 yard butterfly. Ryan Prem joined South Coast just after his freshman water polo season. Playing for the 16u and 18u teams. He currently attends Moorpark College while majoring in Environmental Science.
Bailey Stubblefield—16U & 18U Girls
Bailey graduated from San Jose State University with a BA in graphic design and a double minor in radio, television, video, film and studio art while completing 4 years for SJSU D1 Water Polo program. An attacker from Newbury Park, Bailey joins us with a wealth of water polo knowledge and high-level DI college experience. Bailey earned varsity letter multiple years at Newbury park High School and earned 2nd Team All-Ventura County her senior year. She was a member of South Coast Water Polo Club for her whole club water polo career, which started in 2014. Additionally, in 2017 she was named a USAWP Junior Olympics All-American. Bailey continued her career at San Jose State University where she completed four years of rigorous competition and training earning a starting spot her senior year. She earned all MPSF Mountain Pacific Sports Federation (MPSF) All-Academic team three years in a row. She was a 2021 Arthur Ashe, Jr., Sports Scholar. At the 2022 MPSF conference tournament she ranked 2nd overall in steals. In addition to her South Coast position she is also an assistant coach at Westlake High School.

Jennifer Vreeke—10U & 12U Boys
Vreeke's passion for the pool began as a diver at age 11. By 13, she discovered water polo and went on to play for Thousand Oaks High School, where she also qualified for CIF competition in diving each of her four seasons with the Lancers. Vreeke then attended Cuesta College, where she began her competitive swimming career. She won conference championships in 1meter diving, the 50 breast stroke, and was a member of the 400 medley relay A team. She also competed at the State Championships in waterpolo, swimming, and diving in each of her years at Cuesta.

Vreeke began her coaching career in high school as an assistant Dive coach for the club Dive Thousand Oaks, as well as coaching summer diving classes with Conejo Recreation and Park District. Once in college, she worked as an assistant women's waterpolo coach and the diving coach at Cuesta College. Vreeke then transferred to California Lutheran University, unable to finish out her waterpolo career due to a diving injury. In 2010 she graduated with her Bachelor’s Degree in Art from CLU, then in 2013 received her Master’s Degree in Education with single subject teaching credentials in Art and Physical Education from Pepperdine University. With over 13 years swim instruction and youth coaching experience, she has served as swim lesson coordinator and aquatics director at the Conejo Valley YMCA. She now works as an assistant manager at the CRPD Community pool, and hopes to get a teaching job with CVUSD. Coach Vreeke is the Youth Novice swim team head coach as well as the 10U &12U boys waterpolo head coach.
Xavier Volgenau—16U & 18U Boys
Xavier Volgenau began swimming for the Pleasant Valley Swim Club in Camarillo at age 12. He went on to be a four-year varsity letter winner in swimming at Newbury Park High School, where he represented the Panthers as a three-tim CIF qualifier in the 100 breaststroke and 200 Individual Medley. Xavier also played high school water polo for Newbury Park, earning 1st team All-Marmonte League honors his senior year. He then played water polo for San Jose State University's club team, and graduated with a degree in forensic psychology. Xavier is pursuing a second degree in business marketing at Cal State Channel Islands with plans to continue on for an MBA. Xavier's aquatics career also includes nine years working for Conejo Recreation & Park District.