---
title: Field Theory with Mack-n-Roh |9U-14U | Small Groups
description: Elevate your player's game with Field Theory's tailored training sessions led by elite instructors. Join us Saturdays for skill-building designed for serious athletes aged 9-14.
image: https://rawlingstrainingcenter.com/hubfs/DSC06723.jpg
---

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![mack-n-roh](https://rawlingstrainingcenter.com/hs-fs/hubfs/mack-n-roh.jpg?width=1500&height=300&name=mack-n-roh.jpg "mack-n-roh")

Foundation Class

# 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! 

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### 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**
  
    - **Saturdays **
      
      **9U-10U 10:00am [(register)](https://payments-na1.hubspot.com/payments/hqwZ9PggbDYGy?referrer=PAYMENT_LINK)**
      
      **11U-12U 11:00am [(register)](https://payments-na1.hubspot.com/payments/hqwZ9PggbDYGy?referrer=PAYMENT_LINK)**
      
      **13U-14U 12:00pm [(register)](https://payments-na1.hubspot.com/payments/hqwZ9PggbDYGy?referrer=PAYMENT_LINK)**
- **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.

 

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### 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

 

[ Register ](https://payments-na1.hubspot.com/payments/hqwZ9PggbDYGy?referrer=CMS_MODULE_NEWTAB)

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