In the seventh inning of ALCS Game 4, Cleveland reliever Slade Cecconi throws a cutter outside the strike zone. Umpire Mark Ripperger calls strike three on Yandy Díaz. With two runners in scoring position and both challenges available, Díaz could request an automated review. Instead, he returns to the dugout. Tampa Bay wins 7–3, but the moment illustrates an unusual postseason strategy: one of baseball's most analytically sophisticated organizations is choosing when not to challenge its umpires.
Through the ALCS, Rays hitters hadn't challenged a single pitch despite receiving 23 incorrectly called strikes. Their pitchers and catchers, meanwhile, successfully challenged nine of 13 calls. Tampa Bay appears to be conserving its limited challenges for defense, where an overturned call can transform a walk into a strikeout. The numbers make a compelling case for restraint. But the measure of a successful strategy isn't how often a team wins its challenges. It's how much those challenges contribute to winning games. The Rays have demonstrated proficiency at the former. Whether their approach maximizes the latter is a more complicated question.
The Numbers Behind the Restraint
The regular-season numbers explain Tampa Bay's thinking. The Rays averaged 2.1 challenges per game, overturning 52.8% of contested calls. In October, their challenge volume fell to 1.44 per game while their success rate climbed to approximately 69%. Rays hitters won just 46% of their regular-season challenges, producing an estimated 3.9 runs below average in offensive ABS value, worst in baseball. Their defensive challenges generated 1.6 runs above average, eighth best. Favoring the catcher is rational. But the probability of overturning a call is only part of its value. The count, inning, baserunners and potential consequences matter just as much. A less certain challenge in a pivotal at-bat could be worth considerably more than a near-certain correction in an ordinary one.
Díaz's Own Calculation
Díaz brings his own philosophy to the calculation. Asked about challenging pitches in June, he said, "When I go to home plate, I need a hit, not a challenge." By October 21, MLB calculated that he'd declined 59 opportunities to overturn incorrect calls when challenges were available. Of 139 hitters with at least 25 such opportunities, only two had never challenged. Díaz was one. His restraint suggests a hitter concerned less with correcting umpires than maintaining the concentration required to hit major-league pitching.
Manager Kevin Cash has acknowledged encouraging hitters to preserve challenges for the catcher, particularly when protecting a lead. The approach produced a memorable result in ALCS Game 6, when Liam Hicks successfully challenged a ball call with two runners aboard, converting a full count into an inning-ending strikeout. Cash also recognizes that certain offensive situations justify a challenge. Díaz's seventh-inning strikeout presents precisely that dilemma: preserve two challenges for potential defensive leverage or spend one to keep an at-bat alive with two runners in scoring position. Tampa Bay won anyway, but the decision remains worth examining.
What the World Series Reveals
The distinction matters in the World Series, where Milwaukee won Games 1 and 2 by one run apiece before routing Tampa Bay 10–1 in Game 3. Entering the series, Brewers hitters had attempted seven challenges and won four; Rays hitters had attempted none. Milwaukee catcher William Contreras then won the first ABS challenge in World Series history. None of this establishes that Tampa Bay's restraint has cost it a victory. But it reveals a limitation in evaluating the strategy by overturn percentages alone. A challenge successfully saved is not necessarily an advantage successfully gained.
Baseball has always rewarded those who recognize an advantage before their opponents do. Tampa Bay has built its identity around finding those margins, often through decisions that initially seem counterintuitive. Its ABS strategy follows that tradition. The challenge is determining whether the club has developed a superior method of allocating a scarce resource—or become so disciplined about preserving it that certain opportunities no longer receive proper consideration.
Back in Cleveland, Cecconi's cutter had missed. The umpire called it a strike. Díaz had two runners in scoring position and a chance to keep hitting. He returned to the dugout with both challenges intact.
Tampa Bay won the game. Its strategy may well have been sound.
But a strategy must account for more than the calls it overturns. It must also account for the at-bats it allows to end.
Sources and reporting
Statistical reporting reflects the 2026 regular season and postseason through October 26, 2026. The Rays' zero batter-challenge total and 23 incorrectly called strikes cover the postseason through the ALCS.