Latest from the Blog
Measuring ABS Decision Quality
Evaluating each pitch based on its likelihood to be challenged gives us insight into who is tapping at the right time
Nate Burke · Apr 4, 2026
Leaderboard
53.6%1544/2883 W
Role
Sort
| # | Player | Team | W/C | Win% | Net RE | Net WPA |
|---|---|---|---|---|---|---|
| 4 |  Cal Raleigh | SEA | 20/34 | 59% | +5.02 | +0.456 |
| 5 |  Hunter Goodman | COL | 26/42 | 62% | +5.01 | +0.473 |
| 6 |  Shea Langeliers | ATH | 22/36 | 61% | +4.98 | +0.513 |
| 7 |  Will Smith | LAD | 29/40 | 73% | +4.97 | +0.516 |
| 8 |  William Contreras | MIL | 34/58 | 59% | +4.75 | +0.565 |
| 9 |  Salvador Perez | KC | 26/35 | 74% | +4.74 | +0.523 |
| 10 |  Logan O'Hoppe | LAA | 22/34 | 65% | +4.47 | +0.513 |
League Challenge Trends
Average Challenge Inning
7 day rolling avg of each team's first challenge per game
Average:Challenge:Team:Outcome:
League
Recent Activity
Notable events from the last 7 days
- Ump Miss
Nick Mahrley called a strike on a pitch 5.3 inches outside the zone against batter Ryan Waldschmidt in the top of the 7th5/17
- Ump Miss
Dan Bellino called a ball on a pitch 5.8 inches inside the zone against pitcher Kevin Gausman in the bottom of the 2nd5/17
- 6+ Challenges
CWS attempted 7 challenges in their game against CHC5/17
- Missed Opp
Matt Chapman missed a chance to overturn a strike to a ball in the top of the 2nd against ATH for 0.96 Runs and 9.3% Win Probability5/17
- Missed Opp
Victor Caratini missed a chance to overturn a ball to a strike in the top of the 8th against MIL for 0.35 Runs and 8.7% Win Probability5/17
- Missed Opp
Lawrence Butler missed a chance to overturn a strike to a ball in the bottom of the 5th against SF for 0.62 Runs and 8.6% Win Probability5/17
- Ump Miss
Scott Barry called a strike on a pitch 5.2 inches outside the zone against batter Zach Neto in the bottom of the 9th5/16
- Big Overturn
Joe Mack overturned a ball to a strike in the bottom of the 9th against TB for 0.30 Runs and 11.0% Win Probability5/16
- 6+ Challenges
- 10+ Win%
- Ump Miss
Ron Kulpa called a strike on a pitch 4.3 inches outside the zone against batter Josh Jung in the top of the 9th5/15
- 10+ Win%
KC gained 12.3% Win Probability from challenges in their game against STL5/15
- Big Overturn
Iván Herrera overturned a ball to a strike in the bottom of the 9th against ATH for 0.32 Runs and 10.9% Win Probability5/14
- 6+ Challenges
- 6+ Challenges
HOU attempted 6 challenges in their game against SEA5/14
- 10+ Win%
- Missed Opp
Chandler Simpson missed a chance to overturn a strike to a ball in the top of the 8th against TOR for 0.96 Runs and 7.9% Win Probability5/13
- 10+ Win%
CHC gained 13.9% Win Probability from challenges in their game against ATL5/13
- 10+ Win%
CIN gained 10.8% Win Probability from challenges in their game against WSH5/13