Mass Marlins logo

Our coaches

Been there.
Here to teach.

Coaches with professional and championship-level baseball experience — focused on helping young athletes build fundamentals, confidence, baseball IQ, and character.

Jeff Allison pitching for the Florida Marlins
Jeff Allison's Florida Marlins rookie baseball card

Co-Founder | Director of Player Development

Jeff Allison

Former first-round MLB Draft selection by the Florida Marlins out of high school. Jeff leads our player development philosophy and instruction, bringing experience from professional baseball into an age-appropriate coaching environment.

  • First-round MLB Draft selection
  • Perfect Game Grade 10 — #4-ranked RHP nationally (class of 2003)
  • Professional baseball experience
  • Youth player development
  • Fundamentals, preparation, and confidence
Ryan Moorer in his minor league uniform, glove raised in front of his chest
Ryan Moorer's signed Wisconsin Timber Rattlers baseball card

Baseball Development Coach

Ryan Moorer

Former professional pitcher with experience in the Seattle Mariners organization. Ryan focuses on pitching mechanics, throwing development, and mentorship.

  • Perfect Game Grade 9 — #195-ranked RHP nationally (class of 2004)
  • Pitching mechanics
  • Throwing development
  • Baseball fundamentals
  • Mentorship
Matt Sullivan holding the 2008 NCAA Division III national championship trophy in his Trinity College jersey
Matt Sullivan at bat for Trinity College

Co-Founder | Player Development & Operations

Matt Sullivan

“Coach Sully”

Former collegiate baseball player and member of the 2008 NCAA Division III National Championship team, with a return to the College World Series in 2009. Additional collegiate and youth coaching experience.

  • 2008 National Champion
  • 2009 College World Series appearance
  • Perfect Game Grade 8.5 — 94th-percentile 60-yard dash (class of 2006)
  • NSBL Hall of Fame
  • St. John's Prep Hall of Fame
  • St. John's Prep Best Athlete Award (class of 2006)
  • Ironman Triathlon finisher
  • Collegiate coaching experience
  • Youth baseball coaching
  • Character, competitiveness & leadership

The story behind a national championship

How we coach

Our philosophy.

01

Fundamentals before flash.

02

Repetition creates confidence.

03

Development over early specialization.

04

Effort and attitude matter as much as talent.

05

Every athlete develops at their own pace.

06

Great teammates become great leaders.

07

Baseball teaches lessons that last beyond the game.

Four Sundays.
A stronger ballplayer.

See the Program