Most Home Runs by player in one post season

The most home runs by a player in one post season is 8 by Carlos Beltran

In the 2004 MLB playoffs, Beltrán tied Barry Bonds's single postseason record with 8 home runs. He had one in each of the first four games of the NLCS against the St. Louis Cardinals, including a game-winner in Game 4. Following his two home runs in Game 5 of the previous NLDS against the Atlanta Braves, this gave Beltrán five consecutive postseason games with a home run, setting a record.