Rosenthal reports that Rule 7.13 involves the following:
- The runner may not deviate from direct pathway to plate to initiate contact with a player (NOT just a catcher) covering home plate.
- The runner will be declared out if the umpire judges that the runner ran out of the direct pathway to the plate to collide with the player covering home.
- The catcher CANNOT block the path of the runner trying to score UNLESS the catcher has the ball. Should the catcher block the plate without the ball, the runner will be deemed safe.
- Collision plays are subject to review.
The official MLB Public Relations Twitter account outlined the experimental rule here.
MLB & MLBPA announce experimental rule for 2014 covering collisions at home plate. Details: pic.twitter.com/EiZSoM4s4h
— MLB Public Relations (@MLB_PR) February 24, 2014
Tony Clark also announced that the union will vote on whether this rule will be made permanent after this year, depending on how it works out in the upcoming year.