They want to get the calls right.
That’s why MLB implemented its challenge system, and it’s never on a bigger stage than it is during the World Series, like this year between the Toronto Blue Jays and Los Angeles Dodgers.
The challenges have been flying early and often in this series, too. A few calls have been overturned, and a few have stood firm.
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How many challenges are there in MLB?
In MLB, teams get two manager challenges to start each postseason game.
How do MLB challenges work?
Challenges are made to either overturn a call on the field or let it stand. As of 2025, they can’t yet be used on ball-strike calls.
This is how MLB explains it:
“All reviews are conducted at the Replay Command Center, which is located at Major League Baseball Advanced Media headquarters in New York, by replay officials — full-time Major League umpires who work shifts at the Replay Command Center in addition to their on-field work. Replay officials review all calls subject to replay review and decide whether to change the call on the field, confirm the call on the field or let stand the call on the field due to the lack of clear and convincing evidence.”
The team keeps its challenge if it is successful. If it is unsuccessful, that challenge is lost.
Once all challenges have failed, a manager cannot challenge another call during the game.
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