This rule is somewhat vague. 6.01 © Catcher Interference (6.08) The batter becomes a runner and is entitled to first base without liability to be put out (provided he advances to and touches first base) when the catcher or any fielder interferes with him. If a play follows the interference, the manager of the offense may advise the plate umpire that he elects to decline the interference penalty and accept the play. Such election shall be made immediately at the end of the play. However, if the batter reaches first base on a hit, an error, a base on balls, a hit batsman, or otherwise, and all other runners advance at least one base, the play proceeds without reference to the interference.