The answer is Bobby Lowe in 1894. He hit 4 home runs in one game.
15 home run
3 home Runs in a single GameAlex Rodriguez hit three home runs in a single game 3 times.
The most amount of home runs hit in a single inning is five.
Most home runs in a single world series game, 3 home runs.
16 men have hit 4 home runs in a single game. The last was hit by Josh Hamilton this season against the Baltimore orioles.
Barry Bonds hit the most home runs in a single postseaon with 8 in 2002.
Billy Orth from Houston TX, hitting 5 home-runs in a single game.
Albert Pujols with 3