Posted By:
Marc S.a pitch never needs to be thrown.
From the Baseball Reuls:
8.02 The pitcher shall not-
(a) (1) Bring his pitching hand in contact with his mouth or lips while in the 18 foot circle surrounding the pitching rubber.
EXCEPTION: Provided it is agreed to by both managers, the umpire prior to the start of a game played in cold weather, may permit the pitcher to blow on his hand.
PENALTY: For violation of this part of this rule the umpires shall immediately call a ball.
Thus, (In Theory), if a pitcher goes touches his mouth four straight times, he has issued a walk without every truly throwing a pitch. He can then pick off the runner. He can (in theory) do this 108 times.