Conversation so far:
What is the pine tar incident with George Brett?
In The Pine Tar incident with George Brett, Yankees manager cited a rule that any foreign substance on a bat could extend no further than 18 inches from the knob.

Question: What happened after that?
Self-contained rewrite: What happened after the Yankees manager Billy Martin cited a rule that any foreign substance on a bat could extend no further than 18 inches from the knob?