[SBR Drew]

Three-batter minimum

Pitchers will be required to either face a minimum of three batters or pitch to the end of a half-inning, with exceptions to be made in case of injury or illness. Currently, Rule 5.10(f) states that the starting pitcher must pitch to one batter until that batter is put out or reaches base, and Rule 5.10(g) states that any reliever must pitch to one batter until that batter is put out or reaches base, or the offensive team is put out.


Roster size

The number of active players on each team's roster will increase to 26, up from 25, through Aug. 31 and for the postseason. Rosters will expand to 28 on Sept. 1, a big change from the 40-man limit of the past. Carrying a 28-man roster for September will be mandatory for all clubs.
Additionally, teams will be allowed to carry a 27th player for doubleheaders. Teams had been allowed a 26th player for doubleheaders the past few years.
The number of pitchers a team can carry on its active roster will be capped at 13 through Aug. 31 and at 14 for September.


Position players pitching

In conjunction with the limit on the number of pitchers a team can carry, players must be designated as a pitcher, position player or two-way player prior to each player's first day on the active roster, and the designation cannot be changed for the remainder of the season. To qualify for the two-way designation, a player must have pitched at least 20 innings and started at least 20 major league games as a position player or designated hitter (with at least three plate appearances in each of those games) in the current or prior season.
Position players who are not designated as two-way players will not be allowed to pitch in a game unless the run differential in the game is seven or more, or if the game is in extra innings.


Injured list

Pitchers placed on the injured list will have to miss a minimum of 15 days, rather than the 10-day minimum for position players. The minimum IL stay was changed from 15 to 10 before the 2017 season. (The seven-day concussion list will be unchanged.)


Length of minor league options

With some exceptions for injured list or bereavement list placements, all players optioned to the minors have had to stay there for at least 10 days before being recalled. In 2020, minor league options for pitchers will switch to a minimum of 15 days; the option period will remain 10 days for position players.

[Mase of Base]

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