
In the top of the third inning during the Red Sox’s victory in Miami Monday night, Ceddanne Rafaela watched a 2-2 sinker blow right past him for a called third strike with runners in scoring position. Wanting to extend the AB, Ceddy tapped his helmet and called for a challenge of what was very clearly a pitch that landed in the zone. The automatic ball-strike system confirmed it, and Boston was down a challenge on the night. It didn’t come back to hurt us, of course, but still: not ideal.
In that moment, I thought, “Hmm, Ceddanne isn’t really good at this ABS thing yet, huh?” None of that is to criticize Rafaela’s game; he should get down-ballot MVP votes by the time the season is over. He’s made great strides on offense and his defense is, as usual, stellar. It’s just that he’s gotta work on the challenge thing. None of us are perfect, right? I gotta lay off the carbs and get more active, we all have things we want to improve about ourselves. My doctor would probably tell me that myissue is “more important” than a professional baseball player’s ability to challenge a ball/strike call, but I digress.

That incident (and less so Wilyer Abreu’s successful challenge last night) got me wondering how the Red Sox have statistically fared in this brave new ABS world. Anecdotally, I feel like I’m not the only one who’s felt that we’ve been behind the eight ball basically from the jump this season when it comes to challenging pitches, but I wanted to see for certain. We’re about five months into the campaign now; that sample size is more than big enough to see how we’re doing.
If I could only use one word to describe the Red Sox’s 2026 ABS performance entering Monday’s games, it would be “fourteenth.” According to Baseball Savant, Boston as a team has the 14th most successful challenge rate in MLB for hitters as well as defenders (so, pitchers and catchers combined—though catchers take up the lion’s share of those challenges, with 4,398 catcher challenges leading into Monday across the bigs versus just 144 for pitchers). They’ve had a success rate at the plate of juuuuuuuust under 50% (63 won and 64 lost prior to Monday, and we went 1/2 on those offensive challenges in Miami last night) along with a 60% success rate in the field. The league-wide averages for those rates has been 48% and 58%, respectively.
The Sox are a bit more gun-shy than most when it comes to actually pulling the trigger on an ABS challenge. Their 4.4% challenge rate on offense leading into Monday’s action was the 15th highest in the league—so, right smack in the middle of the majors—while their 2.1% defensive challenge rate is the 10th lowest in baseball. Boston’s actual run value on overturns on their challenges minus their expected run value was -1.7 leading into play on Monday (can I stop prefacing all of these stats with the fact that they weren’t updated after game one in Miami? I think you get it by now), which is 23rd best in baseball. How they calculate that exactly, I’m not sure, but I feel like it’s worth mentioning.
As for specific players, your mind has not been playing tricks on you if you had the same thought I did regarding Mista Rafaela. He is, statistically speaking, the worst ABS challenging hitter on the team by a considerable margin. His net run value versus expectation (again, not 100% sure how you calculate that, but it’s late and I’m tired) is -2.1. Hell, that might be worse by the time the list on Savant updates in the morning. The two next closest guys at the bottom of the list are Willson Conteras (-1.6) and Andruw Monasterio (-1.0). Mona’s only challenged six pitches (and he’s lost five), while Contreras is rocking a 7-13 W-L record on ABS challenges at the plate. Ceddy’s got six wins and 18 (!!!!) losses—yikes.
The good news is that basically everybody else on the roster is above average when it comes to challenging balls and strikes. Mickey Gasper, Masataka Yoshida, Jarren Duran, Nick Sogard, Wilyer Abreu, Anthony Siegler, and Caleb Durbin are all guys who have tapped their helmets at least four times and have come out with a success rate higher than the league average of 48%. Durbin specifically seems to be awesome at this; he’s 13/20 on ABS calls. It’s just Ceddy’s 23 challenges and Contreras’ 20 challenges bringing the success rate down.
Durbin actually ranks in the top 10-in baseball for net ABS overturns versus expected with 5.7. Rafaela in that very same metric, meanwhile, ranks………..well, dead fuckin’ last in MLB with -10. Not to be totally outdone: Contreras is fifth-worst in baseball there with -7.3.
For what it’s worth: no one else on the team besides Durbin, Rafaela, and Contreras has double-digit offensive challenges.

With the catchers behind the plate: Connor Wong has a 64% success rate on 39 challenges (-1.6 overturns over expected), while Adley Rutschman has a 69% (nice) success rate on 13 challenges (1.8 overturns over expected) during his time in Boston.
That clearly doesn’t tell the full story about Rutschman, though, since he’s in the top-10 in the league in that expected metric. While in Baltimore, Adley had 10.5 overturns vs. expected; his 12.4 ABS overturns over expectation has been good for sixth in baseball. One thing to keep an eye on as the season winds down: Rutschman’s challenge rate in Baltimore was 1.3% (almost a full percentage point below what would be his expected challenge rate), while his challenge rate within his small Boston sample size had been 3.3% prior to Monday (almost a full percentage point above the expected rate). Maybe the Sox brain trust is persuading Adley—who we already know is a very capable defender—to trust his judgement of the zone more often?
The entire Red Sox pitching staff has challenged exactly four (4) pitches from the mound in 2026. Ryan Watson won one challenge, Sonny Gray is .500 on his two challenges, and Ranger Suarez lost one challenge. It is not even worth diving into that sample size to try and make a point about it, but I just thought it was funny that we’ve only got four instances of that happening to us.
So, what does this ABS data tell us? What are we able to deduce from the 1,000+ words that I just wrote and you just read?
Uh…………………..don’t let Ceddy and Willson touch their heads as often, I guess? Or let Adley and Caleb touch their heads more often? You tell me in the comments below.
One more thing before I sign off here: I’m in on ABS now. I think I’ve said that before on OTM, but I want to say it again. I was quite skeptical at first, but I like the current system in place as is. Limit the challenges, make it strategic in that sense, but keep this for the long haul. Let me know what you think about ‘em, but I’m a fan.













