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Our Apps

Major League Activation LLC builds tools that make hard things simpler.

Open beta on the web

Diamond Arm Lab

Know when to throw. Know when to rest.

Arm care for youth baseball and softball players: workload tracking, mechanics feedback and throwing programs, built from Matt's 19+ years in professional baseball.

  • Throwing workload tracking with an ACWR (acute:chronic workload ratio) dashboard
  • Video upload with AI scoring of mechanics like stride, hip-shoulder separation and arm slot
  • Curated throwing programs: return-to-throw, long-toss progressions and in-season maintenance
  • Coach Portal for a whole roster, plus SMS reminders for parents
  • Built for ages 10 to 18; installs to the home screen and logs offline
Visit Diamond Arm Lab
Live on the web · iOS coming soon

Mixed Table

One table. Two ways of eating. Zero negotiation.

Dinner for households where one person has celiac. Pick a vibe (Comfort, Fresh, Bold or Fast) and get five gluten-free dinner options everyone can eat. Shared grocery list, week planner, partner profiles and more.

Try Mixed Table

Each app has its own terms and privacy policy: Diamond Arm Lab privacy · Mixed Table privacy. Looking for 1:1 MAT or Neubie sessions with Matt? Get in touch.