Tom Rosemeyer

Tom Rosemeyer – Pitching, Hitting
Tommy has been an instructor with MMB since 2009. He played at for Acalanes High School, Sierra College, and Los Medanos College. In 2008 he became the head pitching coach for the College of the Siskiyous. Tom’s pitching knowledge and ability to get the most out of his pitchers is unmatched. His no-nonsense approach along with his broad knowledge of the game is second to none in the Bay Area.

Chris Debiasi

Chris Debiasi – Hitting, Fielding
An MMB student member since 2002 and instructor since 2006. Chris was a two-sport athlete at Concord High and two sports athlete at Los Medanos College before earning a baseball scholarship to Patten University. Chris began playing professional baseball in 2008. He played under and learned from ex-major league players Gary Templeton, Cory Snyder, Mike Marshall, and Albie Lopez. Chris earned three All-Star appearances, a league Gold Glove award, a team Gold Glove award, and a Fan Favorite award. Chris teaches hitting, base running and fielding.

Kristina Thorson - Girls Fastpitch

Kristina graduated from Shorecrest High School in 2002, where she played softball and performed in the Wind Ensemble and Marching Band. After graduating, she moved to Berkeley to play for Cal’s perennially ranked softball team. She appeared in 3 WCWS tournaments, as well as 2 National
Championship games. In 2006, after graduating with a degree in Public Health – Infectious Diseases, Kristina started doing pitching lessons in the off season while she played professional softball. During her 6 years in the NPF, she played for the Philadelphia Force, Chicago Bandits, and Akron Racers. MMB took her on as the fastpitch pitching instructor in 2007.

HS Awards:
2002 Washington State Gatorade Player of the Year
2002 High School All American
2002 Shorecrest High School Female Athlete of the Year
2002 Shorecrest Softball Defense Award
2002 Shorecrest Athlete of the Spring Season
2001 Washington State 4A Champion
3x All Western Conference Team

UC Berkeley:
NFCA Second Team All American
Easton First Team All American
PAC10 Pitcher of the Year
PAC10 Medal Winner
All- Pacific Region First Team
First-team PAC10
NFCA Second Team All American
Easton First Team All American
All-Pacific Region second team
First team PAC10
PAC10 Champion

NFCA Second Team All American
2004 NCAA Regional MOP
All-Pacific Region second team
First team PAC10
All PAC10 Honorable Mention

Third pitcher in Cal history to amass 100+ wins and 1,000+ strikeouts
Set several pitching records for Cal softball:
Wins in single season: 36
Saves in a single season: 5
Career Saves: 12

2018 Cal Athletic Hall of Fame Inductee

Philadelphia Force 2007
Chicago Bandits 2008-2010
Akron Racers 2011-2012
2007 Rookie of the Year
All-Star 2007, 2011
2008 World Champion

2006 Played for the Dornbirn Sharx in Dornbirn, Austria (League Champions)
2010 & 2011 Played for Fiorini in Forli, Italy (FIBS 2 nd place)

2006 Team USA University Tryout Invite
2007 Team USA Tryout Invite

Dan Runzler - Pitching


• MLB/AAA/AA/A San Francisco Giants (2007-2014)
• NPB Orix Buffaloes (2014)
• AAA Arizona Diamondbacks (2015)
• AAA Minnesota Twins (2016)
• MLB/AAA Pittsburgh Pirates (2017)
• ALPB Sugar Land Skeeters (2018)
• AAA Boston Red Sox (2019)
• LMB Sultanes de Monterrey (2020)
• Low A SAL All Star (2009)
• MiLB Reliever of the Year (2009)
• 2X World Series Champion (2010, 2012)
• Low A SAL Champion (2008)
• High A CAL Champion (2009)
• ALPB Champion (2018)
• AAA All Star International League (2019)

• Cabrillo College (2018-2019)
Mentored Cabrillo College pitchers during the offseason.
Worked on the mechanical and mental side of pitching.
• Sugar Land Skeeters player/pitching coach (2019)
Ran the pitching staff. Set the rotation and assisted in mid game moves for the relievers. Worked with players at various stages of their careers.

• Graduated from Chaminade College Preparatory (2003)
• Studied Sociology at UC Riverside (2004-2007)

Braxton Martinez - Catching, Hitting Fielding

With the Angels Organization. Available for catching, hitting, and fielding instruction.

Travel teams change, coaches change, but MMB is always here to assist in reaching your player’s goals.