[stevenash]

Runners on first and third, pitcher fakes to third, throws to first in an attempt to pick off the runner at first will (possibly) be a balk in 2013.

From the Associated Press:

The Playing Rules Committee has approved a proposal to make it a balk, too, with MLB executives and umpires in agreement. The players' union vetoed the plan for this season to discuss it further. MLB is allowed to implement the change after a one-year wait — no telling whether that would happen if players strongly object.
Under the new wording, a pitcher could not fake to third unless he first stepped off the rubber. If he stayed on the rubber ... it would be a balk.

[zoo youk]

good. it hasnt been successful in decades and just delays the game more