A source has told Scott Miller of CBS Sports, that changes could be coming to September 1st Roster Expansion rules and that it could happen as soon as next season.
The most common scenario under discussion is to expand September rosters to 30, with each club’s 25-man roster on Aug. 31 being locked in throughout September.
In other words, each team would use that 25-man roster as a base throughout September, and then have the ability to add five minor-leaguers (out of however many are recalled) to its active roster for each game during the season’s final month.
The point of using the Aug. 31 rosters as a base? Simple: Each club would be required to keep its five-man rotation eligible every day in September, rather than de-activating the four starters not pitching on a particular night in order to add four more relievers.
The driving force behind this change is to close the loophole that allowed a handful of teams to deactivate their regular starting pitchers until the day of their starts, and replacing those four spots by stacking the bullpen against their opponents.
The new rule will ensure that a team’s five-man rotation remains in place for the entire month of September and activated or deactivated as needed.