Two-Pitch Tunnel Test
Pair the fastball and changeup from the same delivery and initial visual lane, then compare how they separate into assigned finish windows.
Foundation
Sequencing · Pairing
Level
L2
Length
24
Pitches
Fastball, Changeup
Execute 12 FB–CH sequences from a shared initial visual lane to distinct assigned locations.
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 arm, fastball, and delivery 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.
Block 1
Middle-Down Tunnel
Windup — Repeat sequence 3x
- FB — Middle-Down
- CH — Below Zone
Stretch — Repeat sequence 3x
- FB — Middle-Down
- CH — Below Zone
Block 2
Arm-Side Tunnel
Windup — Repeat sequence 3x
- FB — Arm-Side Down
- CH — Arm Side, Below Zone
Stretch — Repeat sequence 3x
- FB — Arm-Side Down
- CH — Arm Side, Below Zone
Sequence Rules
- Middle-Down: The broad lower-middle portion of the established strike window.
- Middle-Down, Below Zone: The area immediately below the Middle-Down target—not just any location outside the zone.
- Arm-Side Down: The lower arm-side portion of the established strike window.
- Arm Side, Below Zone: The area immediately below or slightly farther arm side of the Arm-Side Down target.
Throw the FB first and the CH second in every pair. Use the same delivery, tempo, arm speed, and initial lane; let the changeup grip create the later speed and movement separation. Do not manipulate the release to force movement.
If either pitch misses, record the appropriate miss marker and finish the pair as planned. The second pitch keeps its assigned target; it does not follow the first pitch’s actual miss. Do not add a makeup pitch.
Development or preseason: 1–2 times per week with about 48 hours between structured mound 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. Create two markers:
+
FB SPOT
Fastball finishes within its assigned window.
+
FB MISS
Fastball finishes outside its assigned window.
+
CH SPOT
Fastball finishes within its assigned window.
+
CH MISS
Fastball finishes within its assigned window.
Coaching Focus
- Call the batter side before every sequence.
- Keep all three pitches under one clear location plan.
- Judge each pitch by its role—not by strike result alone.
- Complete the sequence before discussing adjustments.
- Stop if fatigue changes arm speed, effort, or command.
Results
Score the Session
Count complete sequences graded Sequence Hit. A sequence succeeds only when all three pitches remain usable for their intended roles.
6–8 complete sequences
Great
The pitcher executed complete tunnels against both batter sides. Confirm which pattern created the strongest repeatability.
5 complete sequences
Competitive
Several sequences were usable, but one batter side or pattern broke down more often. Build from the stronger tunnel.
0–4 complete sequences
Keep Working
Too many sequences lost their plan before the third pitch. Simplify to one batter side and one pattern.