I was reading Jay Mohr's book about his time on SNL (somebody on here recommended it) and he goes into detail about a 'long time cast member' and a wig incident. During their weekly pickup basketball game, this person's baseball cap came off, wig inside, to reveal a shiny dome up top. They proceeded to pick the cap up and walk off the court without uttering a word.
Here's the list of cast members who were on the show at the same time, I wasn't sure if perhaps one of these guys male pattern baldness was common knowledge?
Two other wig related trivia items from the book: (1) Chris Elliot wore a hairpiece which if you recall made it look like he was going bald...so it was a wig of a receding hairline worn by a completely bald man. (2) Rob Schneider asserts (to Jay) that it's common knowledge Steve Martin wears a wig, although Jay can neither prove/disprove during a skit when he gives Martin's hairline a stare-down