4
The record for the most consecutive home runs hit by a single player in a game is four.
As of the start of the 2008 season, that would be Ken Griffey Jr. who hit 56 home runs in 1997 and 1998.
In Seattle
Duke
15 home run
Griffey, who retired on June 2, 2010, hit eight of his 630 home runs off pitcher David Wells.
The record for the most combined home runs in a single baseball game is 12, achieved in a game between the Detroit Tigers and the Chicago White Sox on May 28, 1995.
Ken Griffey Jr. retired with 630 career home runs, currently sixth on the all-time list.
Ken Griffey Game Used Bats If you are asking about a Ken Griffey Jr. signed game used rookie bat, and a Ken Griffey Jr. game used bat when he hit home run number 600, the 600 home run bat will have more of a significant historic value, and have a far higher value. There would be many rookie year bats, and only one 600 HR bat which is most likely in the Hall of fame or in Griffey's personal collection. A value cannot be given. The signature on the rookie bat means nothing. The bulk of the value will rely on the game use, and the type of provenance or authenticity that accompanies the bat. Some collectors would rather have the game used bat without the signature. In general a Ken Griffey Jr. game used bat is worth about $1,000. more or less depending on the game use, and provenance that accompanies the bat.Bats with historic value will sell for more. A Ken Griffey Jr. Signed Bat (not game usde) is worth about $150.-$250.
The most amount of home runs hit in a single inning is five.
Through the 2009 season, Ken Griffey Jr. with 630.
Mickey Mantle