Seniors (U-15) 

Sean Ivery

Coach Sean Ivery has been involved with lacrosse for most of his life and was a three time varsity letter winner at Syracuse’s Christian Brothers Academy.  He started his college lacrosse at LeMoyne College and moved to Boston College. During that time, Coach Ivery was also active as a summer lacrosse camp counselor and referee for youth lacrosse leagues in the Syracuse area.

Coach Ivery moved to the San Francisco Bay Area in 1996 and took an extended leave from the game.  He soon realized that there was a major thing missing in his life and sought out a way to get back involved with the game that he loves.  

He has been involved with the SFYLC Quakes since 2005 and started coaching the Senior U-15 in 2007.  The 2008 U-15 team was the silver medal winner in the Northern California Junior Lacrosse Association B2 league.  Coach Ivery believes in focusing on getting players at this age level comfortable with their fundamental lacrosse skills so they can react instinctually in game settings.  

Frank Sommers 

Frank Sommers played his college lacrosse as a defenseman for Dartmouth College.

Upon moving to moving to California, Coach Sommers started his coaching at the Pups level of youth lacrosse.  He has been coaching the Senior U-15 with Coach Ivery since 2006.    

Juniors (U-13)

Brent Deisher

Coach Brent Deisher has been playing or coaching lacrosse for 29 years. He grew up in Montclair, N.J. and picked up his first stick in 7th grade.  Montclair High School was a traditional power in New Jersey with a program that focused on the fundamentals of the game.  Coach Deisher played defense on MHS’s 1985 State Championship team and 1986 Coaches Tournament Championship team.    He continued his career at the University of Vermont, where he started at defense during his junior year and his senior year when the team went 9-5.

After college, Coach Deisher moved to San Diego in 1991 and played for the Beachcomber Lacrosse Club for 8 years, including their 1995 Southern California Club Championship team.  For the last 3 years, Coach Deisher also coached and ran the club.

He moved to San Francisco in 1999 and played defense for the San Francisco Lacrosse Club for another 5 years.  It was while playing with SFLC that he met fellow Coach Rob Lewers. 

In 2004, Coach Deisher decided it was time to hang up the cleats but wanted to stay involved in the game.  He coached for the SFYLC  inaugural season in 2005 when the program only had one team.   He took over as Juniors U-13 Head Coach in 2006 and has been serving in that position ever since.  Coach Deisher is a U.S. Lacrosse certified Level 1 Coach.

Rob Lewers

Coach Rob Lewers has been playing lacrosse for 34 years (that is not a typo).  He started playing lacrosse in high school at Malvern Prep in suburban Philadelphia. 

Coach Lewers began his college lacrosse at Anne Arundel Community College in Maryland and than moved on to play and graduate from the University of Delaware in 1986.  After college he played for club teams in Pennsylvania, Maryland and New Jersey. 

Coach Lewers moved to San Francisco in 1991 and played 12 seasons with the San Francisco Lacrosse Club, including their 1997 team that were California Club State Champions.   During this time, he also served 6 years as Secretary of the Northern California Lacrosse Association.

Coach Lewers started coaching the SFYLC Junior U-13 team with fellow SFLC member Brent Deisher in 2006 and has retained that role since.  

Coach Lewers is still active as a player in the Northern California indoor lacrosse and field summer leagues.  He has been married to his wife Laura for 6 years and works as a mortgage broker in San Francisco.

Lightning (U-11)

Colin Toomey

Coach Colin Toomey has been playing lacrosse since he was 12.  Part of his interest in lacrosse was that it was a sport that could be played regardless of size. 

Coach Colin played lacrosse at Mt. Ida College in Boston. Coach Colin has played various positions in the game from Attack to Goalie and uses that experience when coaching.  Colin moved to San Francisco in 2004 and was happy to discover that lacrosse had taken up strong roots in the West.  

Coach Colin has been involved with the Quakes since 2006 as the head coach of the Lightning U-11 team.  Coach Colin enjoys introducing kids at a young age to the fastest growing sport in America. Colin runs his own consulting business as a Web / User Experience Designer in San Francisco.

Marcus Yoder 

Marcus Yoder hails from Memphis, Tennessee but started his love of lacrosse as a goalie at Deerfield Academy in Massachusetts.  Marcus continued his lacrosse career by playing at the University of Tennessee and helped establish the Southeastern Lacrosse Conference (SELC) for the lacrosse teams in the SEC.  After college, he continued playing with adult teams in Memphis, Chicago, and Palo Alto. 

Coach Yoder started coaching the Quakes U11 team in 2010.  Marcus is focused on developing young goalies and defensemen.  If any parents would like individual coaching for their son to improve their goalie skills, please feel free to contact him. 

Marcus Yoder       

Mobile: 415-710-1381        

David Willard is a native of St. Louis, Missouri and graduated from Princeton University in 2005.  During his tenure at Princeton, he started as a defensive midfielder and was on teams that won three Ivy-League Championships, appeared in two NCAA Final Fours and were runner-ups in the 2002 NCAA Division I National Championship Game.  Coach Willard was also honored as an Academic All-American.   

Coach Willard started with the Quakes in 2008 and was instrumental in helping the team to an undefeated regular season.

Bantam (U-9)

Mike Gerrity 

Coach Mike Gerrity grew up in Colorado just as lacrosse was starting its boom in the state.   He picked up his first stick in a sandlot game in 8^th grade and was hooked. Mike went on to play midfield for 4 years at Cherry Creek High School and earned All-State Honors in his senior year.  Mike continued his career playing club lacrosse at the University of Pennsylvania. 

In 2008 Mike was thrilled to pick up a stick again to teach the game to his two sons and their friends.  He started an after school lacrosse clinic to introduce the game to a small group of 6 and 7 year old boys and formed a U9 team that played games against other North Bay clubs.  Mike decided to team up with SFYLC for the 2010 season and will be coaching the club’s inaugural U9 team.  Mike focuses on teaching lacrosse basics, having fun and is looking forward to his first season with the Quakes.