In a motion approved Wednesday afternoon, Major League Baseball has approved a proposal to outlaw collisions at home plate. Pending approval by the MLB Players Association, the new ban could take effect as early as the 2014 season.
Runners will now be required to slide into home plate and catchers will no longer be able to block the dish. Players who violate the new rule will be subject to discipline.
As stated in Rule 7.06(b):
The catcher, without the ball in his possession, has no right to block the pathway of the runner attempting to score. The base line belongs to the runner and the catcher should be there only when he is fielding a ball or when he already has the ball in his hand.
As Buster Olney of ESPN.com notes, umpires will even have the ability to use instant replay in order to make a final decision on whether a player violates the rule.
Via Eye on Baseball