MASO Softball 2017 – Rules by Leagues

Baltimore County:

Varsity

  1. 10 run mercy rule after losing team has batted five times.
  2. International tie breaker will be used starting 8th inning.
  3. Ball must be .47 core and 375 lbs. max compression. Must have NFHS logo.
  4. During cold and/or inclement weather, players may wear anything over their uniforms.
  5. No time limit for varsity. Losing coach may concede at any time.
  6. Metal cleats are permitted.
  7. Doubleheaders, varsity plays two 7 inning games and jv may choose two 5 inning games. Coaches must agree prior to the start of the first game. Once teams agree, the decision cannot be reversed.

JV

  1. Follows the 2 hour time limit rules. No new inning will begin after 2 hours. Once time limit is reached, current inning is completed.
  2. Six runs per inning limit until the last inning.

Baltimore City:

Varsity

  1. Follows rules 1 through 4 and 7 as Baltimore County above.
  2. All games have two hour time limit.
  1. Once limit is reached, current inning is completed.
  2. Exception: If game is tied at the end of the completed inning, the international tie breaker is used until a winner is determined.
  3. There is no time limit for playoff games.

JV

  1. Follows the two hour time limit rules.
  2. 10 run mercy rule after five innings.
  3. Six run per inning limit until the last inning.

Metal cleats are not permitted in Baltimore City.

IAAM League

  1. Three Divisions
  2. Division A:
  1. Follows rules 1 through 5 & 7 as Baltimore County above.
  2. Varsity and JV pitchers must keep both feet in contact with the pitcher’s plate. No backward step is permitted.
  1. Division B:
  1. Follows rules 1 through 5 & 7 as Baltimore County above.
  1. Division C:
  1. Follows rules 2, 3, 4, & 7 as Baltimore County above.
  2. Varsity has a 15 run mercy rule after five innings.
  3. Regular season games have a two hour time limit.
  1. Once time limit is reached, current inning is completed.
  2. Exception: If game is tied at the end of the completed inning, the international tie breaker is used until a winner is determined.
  3. There is no time limit for playoff games.
  1. The batter may not wave the bat in the strike zone on an attempted bunt.
  1. First offense is a team warning.
  2. Second offense is a dead ball strike.

JV – All Divisions:

  1. 13 run mercy rule after five innings.
  2. Six run per inning limit until the last inning.

Metal cleats are not permitted within the IAAM league.

Cross-Over Games

  1. Home team rules prevail:
  2. Teams may use either the ASA or Federation pitching format.
  3. If the home team is from the IAAM C Division:
  4. The teams usually follow the federation mercy rule of 10 runs after five innings with no time limit.
  5. Home team has the final say.
  6. Teams must agree at the pre-game which of the two formats will be used.

Middle School:

  1. Games 7 innings
  2. Teams may not exceed five runs per inning with continuation of play, except last.
  3. Ninety minute time limit. Complete the inning.
  4. Mercy Rule: 15 run rule after five innings. If home team is behind, they get to bat.
  5. No dropped third strike, batter is out.
  6. Coaches have the option of 9 or 10 fielders. Both must agree.
  7. Coaches may choose to bat 9 or 10 or entire lineup.
  8. Pitchers must have both feed in contact with the pitcher’s plate.
  9. Pitching distance is 40 feet.
  10. Runners may steal after pitcher releases the ball and may steal 2nd and 3rd only.
  11. Runners on 3rd may only advance to home by way of a hit or a walk.