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mack-n-roh

Field Theory with Mack & Roh

60 minutes. 2 elite instructors. 1 serious edge.

Want your player to stand out this season? Field Theory with Mack and Roh is where it happens. 

This 60-minute group training session is built for serious 9U–14U athletes who are ready to compete at a higher level. Each Saturday at the Ballwin Balls-n-Strikes facility, two top-tier instructors—Ryan Rohmiller and Mack Ivory—bring the energy, structure, and grit your player needs to sharpen their skills and confidence. There's no commitment from week-to-week. Pick the weeks you want to attend! 

Why Field Theory Works

✅ Personalized Attention
Each session is capped at 10 players so every rep is coached and counted. You’ll leave sharper than you arrived.

✅ Elite-Level Instruction
Ryan Rohmiller isn’t just a coach—he’s a player-builder. Known for his high energy, deep baseball IQ, and relationship-first approach, Ryan knows how to unlock each player’s potential. Right beside him is Mack Ivory, a skilled instructor who pushes players with purpose and positivity.

What You'll Get

  • 60-minute group session

  • High intent defensive instruction

  • Small groups: Max 10 players per session

  • For players ages 9–14

  • Held at Balls-n-Strikes Ballwin

  • Runs through November December, January, February, March, April

You can sign up for one session or all of them—the earlier you reserve, the more reps you get. Players are grouped by age to ensure competitive instruction that fits.

 

Why Parents & Players Love Field Theory 

"My son looks forward to Saturdays more than game days. Mack-n-Roh brings out the best in him every week."
—Parent of a 12U player

"Ryan and Mack actually care about my development. They're not just running drills—they're teaching me the game."
—13U infielder