[mbyron]

This is catcher interference (OBR) or obstruction (FED).

Originally Posted by OBR

7.07 If, with a runner on third base and trying to score by means of a squeeze play or a
steal, the catcher or any other fielder steps on, or in front of home base without possession of
the ball, or touches the batter or his bat, the pitcher shall be charged with a balk, the batter
shall be awarded first base on the interference and the ball is dead.

Originally Posted by Case Book

8.1.1 SITUATION F: R1 is on second base. After B2 takes his position in batter’s
box, F2 clearly reaches out over home plate (a) prior to; (b) after F1 has
made a movement that has committed him to pitch; or (c) to receive the pitch.
RULING: It is catcher obstruction in both (b) and (c), and B2 is awarded first base
and R1 is awarded third base only if he was stealing on the pitch. F2 may not
catch the pitch until it has passed home plate. In (a), there is no violation
provided F2 and his equipment are removed from the area over home plate before
pitcher has made a movement that committed him to pitch. (8-3-1c)