Looking to improve pace of play, Major League Baseball wants to implement a limit on how long managers have to decide on a replay challenge.

The league is looking at a 30-second time limit for managers to decide whether or not to challenge an umpire's call and is currently discussing that limit, along with other possible changes to replay, with the players and umpires, according to sources.

The current rules say that, in most cases, managers must "immediately" inform umpires if they want to challenge a call.