I immediately went for the A's / Cardinals player I had heckled most recently, and that was Randal Grichuk. The only problem is, I confused him for the other "better than Kris Bryant" powerhouse from that era, Stephen Piscotty.
I rattled off 8 in a row pretty easily, but I only know like 5 guys who have ever played for the Angels or the Marlins. No chance I was remembering someone who did both.
Edit: Lol, never would have guessed that donkey.