If an umpire determines that a player has been injured by a hit or thrown ball, he should declare the ball dead and call time out immediately. Runners will be allowed to advance to the base they were attempting only. If a runner intentionally collides with a defensive player, the runner will be called out. Second offense, the runner will be ejected and will be an out in the lineup. The runner must always try to avoid a collision.
Catcher is required to wear a cup.
Pitchers may pitch in a maximum of 4 innings per game. One pitch in an innings constitutes having pitched in that inning. Once removed from pitching, player may not pitch again in that game. On the 2 nd trip to the mound by a coach in an inning, the pitcher must be changed. Balks are to be enforced in accordance with official baseball rules.