Points of note:

1. Frank Robinson has a connection with the San Francisco Giants, as he managed them from 1981 to 1984.

2. TV Tropes has discussed the Beard of Evil trope at length. Evil twins always have goatees. Think Spock.

3. Here is a picture of Frank Robinson, in a Dodgers uniform, wearing a goatee. (Hat-tip to Uni-Watch.)

Draw your own conclusions. But that dude in the picture, whoever he was, was evil. He should not be trusted.

Also, Frank Robinson was on the Dodgers. And Angels! I really need to look at his Baseball Reference page more often.