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Diamond Nine

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Numbered-Ball Hand-Eye Tracking

HittingCage / Gym12 minAges 9-12, 13-15, 16+1-3 playersIntensity: normalPitch Smart OK

Hitter calls a number/color on the incoming ball before swinging. Logs read accuracy.

Use this drill in a practiceBack to library

Your job today

I’ll toss balls with numbers or colors on them. Shout what you see, then only swing if it’s a strike.

What good looks like: Call it right 4 of 5 times and still take a balanced swing at strikes.

Why it matters: The best hitters see the ball early and decide fast. Training your eyes to read the ball is how you stop chasing and start crushing strikes.

How it works

Coach front-tosses balls marked with numbers or colors. The hitter must call the mark out loud as the ball arrives, then take or swing only at strikes. Trains the eyes to track the ball deep and pick up spin and location before the hands commit. Logs call accuracy and hard-hit rate on swings.

Reps / rounds
3 rounds x 5 pitches
Rest between sets
45s
Space needed
cage
Coaches
1

Equipment

  • L-screen
  • marked baseballs
  • marker

If you don't have it

  • No L-screen? Use net + coach behind net (moves to Cage / Gym).
  • No marked_baseballs? Use colored tape on wiffle balls (moves to Backyard).

Setup

  1. Mark balls with two numbers or colors
  2. Set L-screen at age-appropriate distance
  3. Bucket of marked balls within reach

Run the drill

  1. Coach front-tosses a marked ball
  2. Hitter calls the mark out loud, then takes or swings at strikes
  3. Log call correctness and swing result

Coaching cues

  • See the ball out of the hand
  • Call it, then react
  • Track it all the way to the bat

Common mistakes

  • Guessing the call before the ball is readable
  • Letting the call distract from a balanced swing
  • Swinging at balls

Scoring

Track % correct calls (percent). On-track when at or above 70.

Adjust it

Make it easier

  • easier: call color only, no take/swing rule

Make it harder

  • intro: two colors, slow toss
  • intermediate: numbers 1-4, game-speed toss
  • advanced: call the mark + execute take/swing on strikes only

Variations

  • Spin read: Mark balls so the spin direction reveals the call

Safety

  • STOP_ON_PAIN: Distinguish acceptable muscle soreness from joint pain or severe muscle ache. Any pain, pop, or possible injury must be reported to a parent, coach, or trusted adult, and the activity stopped immediately. Any sign of illness or injury must be evaluated before returning.

Source

Author: platform · Status: Reviewed · Last reviewed 2026-06-03