MSBL · Spring 2027 hub
Rules
League rules on the hub. The commissioner can supply official rule text anytime — this page is the home for it.
Commissioner can replace with official copy anytime
Official book
One official GameChanger book per game.
Scoring authority — not a video product. Clubs already score in GameChanger. The hub makes which book is official obvious.
Nine in the field or only one side scoring — the other book is official. Both scoring — home is official. Optional remote scorer if the game is livestreamed and the manager allows it.
Scoring authority · Spring 2027 capability
- One club with only 9 (or only one side scoring): the other GameChanger book is official
- Both clubs scoring: the home team’s book is the official book
- Optional: a parent, fan, or player at home can score that club if the game is livestreamed and the manager allows it
Game day
Policies
Current policies — managers: print this and keep it with your book.
- 1
Lineup cards MUST have first and last names AND uniform numbers (home plate umpire to verify).
- 2
Each player MUST have a jersey with a unique number to participate in a game. No duplicate numbers are permitted.
- 3
All teams MUST use league baseballs — no exceptions.
- 4
All players MUST have their physical ID, a copy of their ID, or have their manager keep copies of each player's ID with them at the field at each game. If a player is asked to provide ID and cannot, that player is immediately removed. They then have 24 hours to supply a photo ID copy to the League Office. If not done within 24 hours and the offending team won the game, that game is ruled a forfeit.
- 5
All weeknight games will be 7 innings.
Board copy
Rules Highlights
A. Rule Highlights
- 1.A/B batting order starting at any position.
- 2.If a team has 10 players in uniform at the game, the team MUST bat all 10.
- 3.If a team has only 9 players, the opposing team will have the option of batting 9 only as well.
- 4.Run rule — 12-run differential after 5½ or 6 complete innings. After 6 complete innings, as soon as the 12-run differential is met, the game is final.
- 5.No new inning may begin after 2 hours and 45 minutes.
B. Review of Rules and Regulations
- 1.All doubleheaders will be 7-inning games unless both managers agree to a different number of innings.
- 2.Once a pitcher is removed from the mound, he may not return to pitch in that inning but may re-enter the game to pitch one time only. This can be used for only one pitcher per game.
- 3.45+/55+/60+ divisions can have up to 3 courtesy runners instead of the normal 2. The third courtesy runner must be for either the pitcher or catcher and stays with the position if that player is removed from pitching or catching.
- 4.Pitchers and catchers can be exempt from running for a batter needing a courtesy runner.
- 5.If a batter (designated as needing a courtesy runner) opts to run, or forgets to get a runner and subsequently runs, he loses designated-runner status for the rest of that game (use it or lose it).
- 6.In divisions 45+ and higher, courtesy runners may not attempt a straight steal (leave on the pitcher's delivery) of 2nd or 3rd base.
- 7.One intentional walk per team, per game. Pitches are NOT thrown (MLB rule).
- 8.2 forfeits — league expulsion. If a forfeit occurs, the team must pay full umpires cost ($270) by the next scheduled game or forfeit the next game.