It'd take a Will Hunting type to even start calculating the probability of two players hitting their 300th career homers in the same game, so I'm not even going to try and figure it out.
At least not according to those quick fact-finding folks at Elias Sports Bureau.
Throw in the fact that both put No. 300 on the board — YESSS! says Hawk Harrelson — in back-to-back at-bats in the second inning and the coincidence is even more fun. (Unless, of course, you're Tigers pitcher Zach Miner.)