11U - Mosquito Division Overview


At the Mosquito level, base paths are set at 60 feet and a regulation hard ball is used. No lead offs are allowed and players cannot steal until the ball crosses the plate. “Live” pitching is used throughout the 6 inning games. A 1st year pitcher (or pitchers) must pitch the first 2 innings per game. Pitching limits follow the LMBA and BC Minor pitching rules. Mosquito is a “House” league.

General Rules

  1. Game times will be according to the provided Regular Season Game Schedule.  A game is not cancelled without the mutual agreement of both team’s coaches.  Parents/Players are not to assume a game is cancelled unless their coaches officially notify them. When a game is cancelled, the Home Team Coach must notify the Umpire Coordinator, Concession Manager and Mosquito Division Manager. Minimum game cancellation notification time is 1 ¾ hours before game time start.
  2. Game length is six (6) innings or two (2) hours after the scheduled start time.
  3. No inning to start later than 1 ¾ hours after the actual game start time, if there is another game scheduled afterwards, or if the umpire decides it is too dark to play safely.  The game may be called (Umpire’s decision), and game score reverts back to the previous completed inning played.  If the home team is at bat and the time passes the two (2) hour mark, the inning should be completed if possible (Umpire’s decision).
  4. Players will be allowed to play a single position for a maximum of three innings per game. For the purposes of this rule the outfield positions shall be considered to be a single position.
  5. No player shall sit out more than one (1) inning consecutively and a maximum of two (2) innings per game. (The only exception is for injury or discipline reasons.) In the case of an extra inning game, this rule will apply separately to each set of six innings in succession. If player cannot play defensively he must come out of the game.
  6. On an overthrow to first or third base that goes into out of bounds territory, the runners will advance one base beyond the last base he was attempting to reach or had safely reached when the overthrow was made.
  7. For each game two (2) runs will end a ½ inning in the first two (2) innings, four (4) runs will end a ½ inning in innings three (3) through five (5) and the sixth (6) inning (or last inning declared by the umpire), will be an open inning with no maximum run limit.
  8. All Players are to bat (i.e. placed in the batting order line up).  Players must have their shirts properly tucked in when batting.
  9. Players must wear regulation LMBA regular season hats when playing a defensive position (catcher excepted).
  10. All Team’s Players must wear matching grey colored pants.  Player(s) wearing mismatched colored pants to their teammates will not be allowed to play in the game.
  11. All players are to remain in the dugout or on the benches at all times when their team is at bat except the on-deck batter. Players warming up to return to the defensive line-up can do so in the out of bounds area nearest their dugout.
  12. Coaches or players must warm up pitchers only. A catcher’s mask must be worn when warming up a pitcher.
  13. The home team is to prepare the field and secure the equipment. After each game, the home team shall rake the infield. If another game is being played after, the home team of the game to be played will line the field.  During dry weather, if it is the last game of the day, the home team shall also hose down the infield after raking (Please drain the hose and return it to the equipment box.)
  14. Players will be warned once about throwing of bats, helmets, etc. The second occurrence could result in ejection by the Umpire (Umpire decision).
  15. A team is allowed a maximum of three (3) coaches in a game, inside the field fenced perimeter, once the game commences.
  16. The ball is considered to be in play so long as it remains inside the fenced area of the ball field and runners may continue to advance as far as they want.
  17. The batter is out on the third strike whether the ball is caught or not. The ball is live and runners may attempt to advance.
  18. Stealing a base is allowed, but Lead Offs are not allowed. Runners may not leave the base until the ball has crossed home plate. The penalty for a runner leaving early is to be called out (Umpire’s Decision). The ball is live and play shall continue as if there was no lead off.
  19. Runners cannot steal while the pitcher is on the rubber and in the pitching position with the ball in his possession.
  20. Slide or avoid rule is in effect.
  21. No head first sliding unless being forced back to a base.  Penalty is an automatic out.
  22. Ten (10) run mercy rule is in effect after 5 or more innings (4 1⁄2 innings if home team is leading).
  23. Bunting is allowed.
  24. The infield fly rule is not in effect (i.e. Umpires shall not call an automatic out).
  25. No stealing of home is allowed in the first two innings. The only two (2) ways a player can score in the first two innings is if forced in by a walk or the continuation of a play beginning with a hit ball.
  26. No Protests or appeals are allowed.
  27. Second year Tadpole players will be eligible to play if a team is short of players, so long as it does not conflict with their own Tadpole scheduled game. BC Minor limits 5 regular season games plus one tournament for Tadpole player eligibility in the Mosquito Division, and has stiff penalties for violations. Teams are encouraged to call up second year Tadpole players when they have 9 or less players available for a game. Coaches are requested to inform the Tadpole player’s coach when asking a Tadpole player to play in a Mosquito game. Tadpole players must wear their regular team uniform when playing Mosquito games. Tadpole players are not allowed to pitch in the Mosquito division.

Pitching Rules

  1. All BC Minor and LMBA pitching rules are in effect.
  2. Number of Pitches & Required Rest:
    • 1 – 25 pitches = no rest
    • 26 - 40 pitches = 2 nights rest
    • 41- 55 pitches = 3 nights rest
    • 56 - 65 pitches = 4 nights rest
    • 66 - 75 pitches = 5 nights rest
  1. Pitchers may only pitch on three (3) consecutive days if their combined total for days 1 and 2 do not exceed 25 pitches and games are during spring tournaments, summer, single seasons or Provincials. Pitchers may not pitch on four (4) consecutive days.
  2. A rainout or delayed/suspended game will not affect the pitching regarding the 2 or 3 nights rest rule, so any pitcher who was ineligible to pitch when the game was originally supposed to start shall remain ineligible when the game is played.
  3. The first two innings of each game must be pitched by a first year player defined as a player who did not play in the Mosquito Division in a previous year, and who is eligible to play one more year in the Mosquito Division.
  4. The first two innings of every Mosquito game will be limited to a maximum run count of two (2) runs per team per inning.  Innings three (3) through five (5) will have a maximum run count of four (4) runs per team per inning.  Inning six (6) , or last inning declared by the umpire due to time limit or darkness, will be an open inning with no maximum run limit.
  5. Maximum number of innings a player can pitch in one game is three (3) innings. A player who pitches three (3) innings in a game may not pitch at all in his team’s next game regardless of when that game is scheduled.
  6. Wild pitch rule: pitcher hits 2 players in one game—pitcher will be removed from the mound unless the umpire determines that the batter could have avoided being hit through a reasonable effort (Umpire’s decision).
  7. Balks are not called except as follows:
    • · When with runners on base, the pitcher fails to deliver the pitch after beginning his pitching motion, the umpire shall call, “Time…no pitch”. The umpire shall relate to the pitcher that he must deliver the ball without stopping his motion as this is a ball.  No runners may advance on the call.  Any subsequent failure to deliver the pitch after starting his motion, the umpire shall call “Time, ball”, and then charge the pitcher with a ball.  No runners may advance on the ball.
      Note: The intent of this rule is to prevent pitchers from stopping their delivery to home plate when they see a batter square to bunt.
  8. Coaches may visit the mound once per inning per pitcher. If exceeded, the pitcher must be replaced.
  9. Once a pitcher is removed from pitching in a game, they cannot re-enter the pitching position during that game.

Official Score Keeping and Pitching Records

  1. The home team’s scorekeeper will be considered the official scorekeeper.
  2. Each team’s official scorekeeper will be responsible for completing their respective team’s pitch count sheet. Team Managers must sign each team’s pitch count sheet, and they must be handed into concession at the end of each game – No exceptions to this rule!
  3. Each team’s completed pitch count sheet is to be placed in the Pitch Count Binder in the concession, prior to leaving the field.  Blank Pitch Count Sheets can be found in the back section of the Pitch Count Binder.

11U "Mosquito" Documents