In the comments for the last post, Chris pointed out a good one that I overlooked. Here’s Metallica’s James Hetfield and Mark McGwire:
And one my father pointed out a really long time ago, which is actually an amazing call. Here are John Kruk and Meat Loaf, and I’m pretty certain they’re the same person:
Tedquarters 
Not a musician but another baseball look alike…… Joba Chamberlain:
And this guy:
hahaha this is great. you must have put in a ton of time into finding two such similar pictures