RulesMLB Umpire Manual
FIELDER PROTECTED WHILE MAKING A PLAY
Rule 6.01(a)(10): Note that under the Official Baseball Rules, a fielder is protected while in the act of fielding a batted ball. If, after a player has fielded a batted ball but before he is able to throw the ball, a runner hinders or impedes such fielder, the runner shall be called out for interference….
RulesMLB Umpire Manual
OFFENSIVE INTERFERENCE
Rule 6.01, Definitions of Terms (Interference(a)): While contact may occur between a fielder and runner during a tag attempt, a runner is not allowed to use his hands or arms to commit an obviously malicious or unsportsmanlike act—such as grabbing, tackling, intentionally slapping at the baseball, punching, kicking, flagrantly using his arms or forearms, etc.—to…