Josh Hamitlon goes 4-5 with 4 homeruns and a double in a win over the red-hot, 19-11 Baltimore Orioles. The last player to hit 4 HR’s in a game was Carlos Delgado in 2003, and the last Dodger to do that was Shawn Green in 2002 - Green went 6-6 with 4 homeruns a double and a single and currently holds the record for most total bases with 19 in a single game.
But this one’s about Josh ;)
For a full list, check out “Players with 4 homeruns in a game”. And for an impressive read on where this falls in history, read this article at FanGraphs.