Full-Arsenal Location Matrix
Test four established pitches across four location categories to identify dependable pitch-location combinations.
Foundation
Command · Assessment
Level
L4
Length
32
Pitches
Fastball, Changeup, Advanced Pitch 1, Advanced Pitch 2
Goal: Compare execution for four established pitches across glove side, arm side, primary finish, and weakest-location targets.
WARMUP
Before the first pitch.
Complete a proper throwing warm-up before scoring pitches. Use full-body movement, progressive catch play, and enough mound-ramp-up pitches for the listed pitch types and delivery modes to feel ready.
Warm-up throws are not included in the workout score, but they still count toward the pitcher’s total throwing workload for the day.
Use the pitcher’s established primary delivery—Windup or Stretch—for all 32 pitches. Record the delivery used and use the same delivery whenever this workout is repeated.
Block 1
Glove-Side Window
Repeat sequence 2x
- FB — Glove-Side Window
- CH — Glove-Side Window
- ADV1 — Glove-Side Window
- ADV2 — Glove-Side Window
Block 2
Arm-Side Window
Repeat sequence 2x
- FB — Arm-Side Window
- CH — Arm-Side Window
- ADV1 — Arm-Side Window
- ADV2 — Arm-Side Window
Block 3
Primary Finish Locations
Repeat sequence 2x
- FB — Assigned Primary Finish Location
- CH — Assigned Primary Finish Location
- ADV1 — Assigned Primary Finish Location
- ADV2 — Assigned Primary Finish Location
Block 4
Weakest-Location Retest
Repeat sequence 2x
- FB — Assigned Weakest Location
- CH — Assigned Weakest Location
- ADV1 — Assigned Weakest Location
- ADV2 — Assigned Weakest Location
Location Definitions and Matrix Rules
- Glove-Side Window / Arm-Side Window: The broad portion of the established strike window on the called side.
- Assigned Primary Finish Location: The location the pitcher currently trusts most for that pitch. Define one per pitch before Pitch 1.
- Assigned Weakest Location: One approved location selected from prior results or coach observation. Define one per pitch before Pitch 1.
- Matrix Rule: Every pitch type receives 2 attempts in each location category. Do not change a target after a miss.
Record the MISS marker and continue the matrix with the original pitch-location assignments. Do not repeat the pitch or add a makeup pitch.
32 tracked pitches: 8 FB, 8 CH, 8 ADV1, and 8 ADV2; 8 pitches in each location block.
Development or preseason: 1 time per week with at least 48 hours between meaningful throwing sessions.
In season: 0–1 development bullpen per week. A game appearance or other meaningful mound session replaces it.
Track This Session
Choose Bullpen Session. Name it Full-Arsenal Location Matrix — [Pitcher]. Create 5 markers.
Delivery tracking: Record the pitcher’s primary delivery—Windup or Stretch—before Pitch 1. Use that delivery for all 32 pitches and whenever the workout is repeated.
+
FB
Fastball finishes within its assigned target.
+
CH
Changeup finishes within its assigned target.
+
ADV1
Advanced Pitch 1 finishes within its assigned target.
+
ADV2
Advanced Pitch 2 finishes within its assigned target.
+
MISS
Any pitch finishes outside its assigned target.
Coaching Focus
- Define every pitch’s Primary Finish and Weakest Location before Pitch 1.
- Keep the same delivery, intent, and target size across the matrix.
- Do not steer one pitch simply because its movement profile is different.
- Record the result and continue without changing the next assignment.
- Stop when fatigue changes arm speed, shape, command, or delivery quality.
RESULTS
Score the Session
Count pitch-specific SPOT results out of 32. Each pitch succeeds when it reaches its assigned target; use the report to compare all 16 pitch-location pairs rather than relying on the total alone.
24–32 SPOT pitches
Great
The arsenal produced multiple dependable pitch-location combinations across all four blocks.
18–23 SPOT pitches
Competitive
Several combinations are usable, but one pitch type or location block produced a clear drop-off.
0–17 SPOT pitches
Keep Working
Too few pitch-location combinations are repeatable. Narrow the next session to the two most important pitches and locations.