What is Tipping Pitches? Definition and Examples
Tipping pitches is when a pitcher unconsciously reveals which pitch he's about to throw through a tell in his grip, glove, or delivery, giving hitters advance notice.
What is Tipping Pitches?
Tipping pitches means a pitcher is inadvertently signaling his pitch selection to the hitter before the ball leaves his hand. The "tip" is any consistent, visible difference in his pre-pitch behavior — a glove held higher for a curveball, a wrist angle visible for a changeup, a slower arm action on offspeed stuff. Hitters and opposing dugouts study video relentlessly to find these tells, and once a tip is identified, the pitcher's effectiveness collapses.
How Tells Are Identified
There is no formula — detection is observational and video-based:
- Grip exposure: the hitter or base runner sees the pitcher's hand adjusting inside the glove differently per pitch.
- Glove position: a glove set at the chest for fastballs but at the belt for breaking balls.
- Tempo and arm speed: decelerating the arm on a changeup or rushing the delivery on a slider.
- Release variation: a measurably different release point or arm slot by pitch type, which Statcast data can confirm.
Teams now run dedicated "pitch-tipping audits" using high-speed cameras and machine learning, comparing frame-by-frame delivery data across pitch types to catch tells before opponents do.
Worked Example
The most famous modern case: in the 2017 postseason, the Astros reportedly identified that Yu Darvish was tipping his pitches — his glove and hand movements differed between his fastball and his breaking ball. Darvish was shelled twice in the World Series, recording just 10 outs across two starts while allowing 8 earned runs. After the season, video confirmed the tell. Pitchers fix tips by standardizing their glove position, adding a consistent glove waggle, or changing their set position — small mechanical edits that restore the deception their pitch tunneling depends on.
Why It Matters
Modern pitching is built on deception: pitch tunneling and spin mirroring work only if every pitch looks identical until the hitter must commit. A tip destroys that illusion — a hitter who knows a slider is coming can lay off it or sit on it, spiking hard-hit rate and cratering whiff rate. Front offices treat tipping audits as routine maintenance, and a sudden unexplained performance drop almost always triggers a tip review before any mechanical overhaul.
Limitations and Misconceptions
Tipping is often over-diagnosed by fans. A pitcher getting hit hard is usually executing poorly, not tipping — location mistakes over the heart of the plate get punished regardless of deception. Tipping is also confused with illegal sign stealing: reading a pitcher's natural tells from video or the dugout is legal; using real-time electronic relay is not. Finally, not every delivery difference is exploitable — the tell must be visible early enough for the hitter to act on it.
In Legends Deck: Pitcher cards with elite deception and tunneling ratings generate higher simulated whiff rates, and consistency ratings model how well a pitcher hides his mix — the in-game reflection of real-world tipping risk.