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. Furthermore, a runner who is judged to have hindered a fielder who is attempting to make a play on a batted ball is out whether the hindrance was intentional or not.