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CV Synergy

CV Synergy was established in 1995 and is the only travel program endorsed and supported by Castro Valley Girls Softball League (CVSGL).  CVGSL is a non-profit organization providing girls between the ages of 4-18 the opportunity to participate in recreational softball and competitive travel team program at the ASA Junior Olympic “A” and “B” levels.  CV Synergy travel program has produced numerous teams within the ASA Junior Olympic “A” and “B” divisions and has successfully competed at ASA National, and PGF National tournaments.  Additionally, we are extremely proud that many former CV Synergy players have received college scholarships to play softball at Divisions I, II, III  and NAIA.


Synergy 14A - AST Gumball Runner Up June 2021

CV Synergy 14A played in their first tournament of the summer at the AST Gumball in Fremont. They made it to the championship game. Congratulations.

AST Gumball Runner Up June 2021

Synergy 14A Summer 2021 Team

Castro Valley Synergy would like to announce the CV Synergy 14A team coached by Mark Peterson. The team will be playing this summer and their tournament schedule is listed below. Good luck with your season.

June 12-13 - AST The Gumball

June 26-27 - AST State Championships

July 10-11 - AST Top Gun

July 24-25 - AST Last Stop

Looking for players for Synergy 14U - 2021 Summer

UPDATE 5/3/2021:

The tryout originally scheduled for Sunday 5/9/2021 has been canceled. For more information or a private tryout, please contact Mark Peterson via phone or text at 510-760-7600 or via email at


CVGSL is planning the return of our 14U Synergy Travel Ball program! This season the 2021 Summer team will be coached by Mark Peterson. Unlike our recreational program, travel ball is a competitive program, designed to enhance skills, strategies, and player development. All players must tryout to participate.

Tryout Information:

  • First Tryout will be Sunday May 2, from 12:30-3 pm at the CVHS Softball Fields.
  • Second Tryouts/Call backs, if necessary, will be the following week Sunday, May 9, from 12:30-3 pm at the CVHS Softball Fields. Second tryout cancelled--contact Mark Peterson via phone or text at 510-760-7600 or via email at for private tryout. 
  • Please be prompt. We will use the first few minutes to collect paperwork; both the registration form and Covid screener are mandatory. If you cannot download these from our site, please email Mark Peterson for a copy. To save time, please bring all forms to the tryout filled out.
  • Due to Covid restrictions, all players must wear face coverings and bring all of their own gear (cleats, glove, bats, helmet, water, etc). No sharing is allowed.
  • Please use the Gate #1 on Redwood Road near the Tennis Courts in the Senior Parking Lot. You may park in that lot.

Team Information:

  • Girls whose birth year is 2006 or later are eligible for 14U.
  • Players will be required to attend a minimum of 3 practices per week and expected to participate in approximately 4 weekend tournaments throughout the summer.
  • Coaches will use Team Snap and Gamechanger to communicate practice times, tournament locations, and team stats.
  • Playing time during games reflects each player’s work and attitude on and off the field.
  • Expect to play competitively, work hard, advance your skills, and have fun!

Mark Peterson began coaching for his twin daughters in the Castro Valley Girls Softball League in 2017. He coached on rec teams, assisted at the Synergy travel ball team’s practices, as well as coaching the Stompers in The San Ramon Valley Girls Athletic League during his daughters’ time with their 14U team. Mark is dedicated to supporting and furthering Girls Softball in Castro Valley. His goal is to provide his teams with the playing time, confidence, and best skills needed to play for both their community and schools.

Mark’s 2021 coaching staff will include former Synergy coaches. This is an excellent opportunity for CV students who want to go onto playing high school ball.

If you are interested in this Synergy 14U team or have more questions, please contact Mark directly at or call/text at 510-760-7600.

Looking for Coaches

The Castro Valley Synergy Softball program is looking for qualified coaches for the 2019 season. If you are interested please contact Stuart Siu at

Synergy achievements through the years

  • Synergy 14U Black Widow Gold Bracket Champions - Hayward 10/13/2019
  • Synergy 14A - Diamond Classic Silver Bracket Winner - Hayward 9/22/19
  • Synergy 12A AST Easter Saturday Silver Bracket Winner 2019
  • Synergy 12A Shooting Star Gold Runner Up 7/7/2019
  • Synergy 12B Keilani Rickets Gold Bracket Runner up 2018
  • Synergy 12C CSA Napa Summer Champs
  • Synergy 12U ASA NorCal Championships 2018 - qualified for Cal State Games
  • Synergy 10B USA Spooktacular runner ups 10/29/2017
  • Synergy 14A 1st to 3rd Monster Mash for Cash Champions 10/22/2017
  • Synergy 10B USSSA Monster Bash Champions 10/22/2017
  • Synergy 10U Strawberry Jam Gold Champions 7/23/2017
  • Synergy 10U - Mendoza, Runner-up Gold Bracket Wess Jones Memorial 7/9/2017
  • Synergy 10U - Green, Runner-up Silver Bracket Wess Jones Memorial 7/9/2017
  • Synergy 16A - USSSA Double Double 16/18U Gold Champions 6/25/2017
  • Synergy 16A - USSSA Pride 16/18U Mistlin runner-up 6/18/2017
  • Synergy 12A Runner-up Petaluma Father's Day Tournament 6/18/2017
  • Synergy 10B Classic Twister Silver Runner-up 6/11/2017
  • Synergy 14A Norcal Finest's 4th Annual Invitational - Silver Champions - 4/2/2017
  • Synergy 16A 2017 Summer Team
  • Synergy 8B Fall - Monster Bash Runner Up 10/23/2016
  • Synergy 8B Fall - Play for the Cure 2016 Champions 10/2/2016
  • Synergy 16A Fall - Swing4Fences Runner up 10/2/2016
  • Synergy 8B Fall - Battle of the Bats Champions 9/18/2016
  • Synergy 14A Triple Crown World Series Reno Bronze Champions 7/23/16
  • Synergy 8B Summer Slam Silver Champions 7/10/2016
  • Synergy 18G NSA State Champions 7/5/2016
  • Synergy 12A NorCal Association Championships 3rd Place 6/19/2016
  • Synergy 14A Gumball Champions 6/12/2016
  • Synergy 14A Halloween Bash Champions 11/1/2015
  • Synergy 14A Monster Bash 2nd Place 10/25/2015
  • Synergy 14A Pink Panther 10/11/2015
  • Synergy 12A ASA Powerforce II Champions 9/28/2015
  • Synergy 18G NSA State Champions 2015
  • Synergy 12A ASA Nationals Roseville 2015
  • Synergy Teams Summer 2015
  • Synergy 14A AST Gumball Runner Up Fremont June 2021