MLB allowed it starting in August 2008 but in a limited manner: To determine home runs.
Now, virtually every decision likely will be subject to review, except balls and strikes, checked swings and some foul tips.
"Tag plays, out/safe at first, fair/foul past the bags, those are all going to be included," said Rob Manfred, MLB's chief operating officer.
So no more blown calls, like Don Denkinger's at first base that turned Game 6 of the 1985 World Series or Jim Joyce's bad decision at first base that cost Detroit's Armando Galarraga a perfect game in 2010.
"We want to get more plays right, the ones that matter," Manfred said.
Manfred said when a manager wants to challenge a call, he will notify an umpire, triggering a review in New York by what are likely to be present or retired big league umps. A headset would be brought to the crew chief, who would be notified of the decision.
There will be a maximum of two challenges per manager in each game "it could be less," Manfred said and if the challenge is upheld it would not be counted against the manager's limit. If a manager is out of challenges, umpires probably will be allowed to request a review on their own.
"Getting more plays right can only enhance the game," St. Louis Cardinals general manager John Mozeliak said.
Selig has emphasized that he doesn't want replay to slow games, whose increased length in recent decades has been targeted for criticism.
In tests last week in the minor Arizona Fall League, most reviews averaged 1 minute, 40 seconds.