Rookie League question

[RKBUmp]

Went and watched a rookie league game between the Indians and the Dodgers last night and came away with a question.

Runner coming home, catcher is in front of the plate on 1st base line, plenty of room for runner to get to plate without contacting the catcher. The throw is cut and would not have made it in time anyway, runner lowers his shoulder and just mows down the catcher. He physically had to go out of his way to make contact. Ump didnt say a word, but there were a lot of rather loud BS'S coming from the dugout. Is there no rules in minor league ball that protects the catcher or another player in similar situation?

Ultimate result of this, 2 innings later, the offender comes to bat and 1st pitch sails over his head, 2nd pitch is a strike, 3rd pitch gets him right between the shoulder blades. Obviously a payback and now the ump goes out and has some words with the pitcher.