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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
53.3%1629/3055 W
Role
Sort
| # | Player | Team | W/C | Win% | Net RE | Net WPA | CDQ |
|---|---|---|---|---|---|---|---|
| 4 |  Carson Kelly | CHC | 23/27 | 85% | +5.83 | +0.493 | +11.69 |
| 5 |  Tyler Stephenson | CIN | 29/38 | 76% | +4.00 | +0.366 | +10.61 |
| 6 |  Victor Caratini | MIN | 21/29 | 72% | +3.13 | +0.291 | +8.83 |
| 7 |  Will Smith | LAD | 29/40 | 73% | +4.97 | +0.516 | +6.75 |
| 8 |  Iván Herrera | STL | 21/32 | 66% | +4.44 | +0.538 | +6.48 |
| 9 |  J.T. Realmuto | PHI | 13/17 | 77% | +2.36 | +0.281 | +6.41 |
| 10 |  Adley Rutschman | BAL | 8/12 | 67% | +1.17 | +0.166 | +6.26 |
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
- Big Overturn
Kyle Karros overturned a strike to a ball in the bottom of the 4th against TEX for 1.79 Runs and 21.8% Win Probability5/20
- 1.5+ Runs
- 10+ Win%
- Big Overturn
Max Muncy overturned a strike to a ball in the top of the 9th against SD for 0.42 Runs and 10.5% Win Probability5/19
- 10+ Win%
CIN gained 11.8% Win Probability from challenges in their game against PHI5/19
- 10+ Win%
- Big Overturn
- Missed Opp
Rob Refsnyder missed a chance to overturn a strike to a ball in the bottom of the 6th against CWS for 0.81 Runs and 1.9% Win Probability5/18
- 10+ Win%
- 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