IVB RAW
Induced Vertical Break measures how much a fastball resists gravity due to backspin. Higher IVB means the pitch stays above the barrel longer. In this terminal, 18"+ marks the elite carry threshold.
Result: Elevated whiff potential and weaker vertical contact.
IVB VS AVG
A velo-bucket comparison showing how much a pitcher’s IVB beats or trails the league norm for that exact fastball speed band. Winning the bucket creates carry-driven deception because the ball moves better than the hitter expects for the velocity.
Result: Hidden shape advantage and increased swing-miss deception.
APEX RISE
The elite 18"+ IVB tier. These fastballs create the visual illusion of rise because they drop less than the hitter’s brain expects. That mismatch leads to swing-unders and pop-up contact.
Result: High whiff rate and premium carry profile.
THE DEAD ZONE
The 12"–15" IVB danger band. This flatter path intersects more directly with the hitter’s natural swing plane and behaves like a Barrel Magnet when shape quality is not strong enough to miss the barrel.
Result: Elevated hard contact and home-run risk.
WHIFF PROB
The terminal’s bottom-line translation layer for bat-missing expectation. It converts IVB and, later, VAA into a direct swing-and-miss forecast instead of forcing the user to interpret raw physics manually.
Result: Faster identification of strikeout-friendly fastball shapes.
As VAA is integrated, Whiff Prob will become the most predictive metric in the terminal for identifying elite swing-and-miss talent.
CLIMBERS
A pitch-shape breakout signal. A gain of roughly +1.5" or more in IVB indicates a meaningful mechanical or shape-level change that fantasy managers should treat as actionable, not cosmetic.
Result: Early identification of emerging bat-missing arms.
STATUS KEY
CLEAR: Signal Strength: High. The pitch has cleared the dangerous flat-path zone.
Result: Safer fastball shape profile.
COLD: Signal Strength: Danger. The pitch lacks vertical life and stays in the hitter’s path.
Result: Elevated contact quality and home-run risk.
MEDIUM: Signal Strength: Neutral. Bat-missing shape is present, but location or velocity still needs to carry part of the profile.
Result: Moderate whiff utility.
HIGH: Signal Strength: Premium. The shape profile is optimized for swing-and-miss.
Result: Strong strikeout potential.
LOW: Signal Strength: Weak. The shape does not independently generate enough bat-missing utility.
Result: Contact-driven outcome risk.
VAA remains a pending upstream layer in this version. That is why VAA currently displays as -- on the cards. This will be upgraded later through upstream metric refinement and can cleanly live in a future Supabase-backed LAB table or view.
The Dead Zone
Fastballs with 12"–15" IVB. This flatter shape sits directly in the swing path, creating a barrel-friendly entry profile. The result: louder contact, more home-run danger, and contact-risk traps.
VAA remains a pending upstream layer in this version. That is why VAA currently displays as -- on the cards. This will be upgraded later through upstream metric refinement and can cleanly live in a future Supabase-backed LAB table or view.