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In Seattle
On September 14, 1990, Seattle Mariner teammates Ken Griffey Sr. and Ken Griffey Jr. hit back-to-back home runs against California Angels pitcher Kurt McCaskill. Griffey Sr. had been traded after spending an abbreviated second stint with the Cincinnati Reds, who won the 1990 World Series.
Four, all for the Seattle Mariners: 1994, 1997, 1998, and 1999.
Ken Griffey Jr. retired with 630 career home runs, currently sixth on the all-time list.
In 1990, Ken Griffey played in 21 games for the Seattle Mariners, batting in all of them. He had 77 at bats, getting 29 hits, for a .377 batting average, with 0 sacrifice hits, 1 sacrifice flies, and 18 runs batted in. He was walked 10 times. He struck out 3 times. He hit 2 doubles, 0 triples, and 3 home runs.
Ken Griffey Jr and Don Mattingly share the record with 8 consecutive games with a home run
Ken Griffey Jr. was 19 when he broke in with the Seattle Mariners in April of 1989. In his first at-bat he doubled off Oakland A's right-hander Dave Stewart. In his first at-bat at home, Griffey homered to left field off White Sox starter Eric King.
That was 1997 when they hit 264 home runs breaking the MLB record of 257 home runs by the 1996 Baltimore Orioles. Ken Griffey Jr. led the team with 56, Jay Buhner had 40, and Paul Sorrento had 31. They had 6 players with 20+ HRs that season (the 3 above and Edgar Martinez with 28, Alex Rodriguez with 23, and Russ Davis with 20). Griffey Jr. hit home runs in 8 consecutive games, tying an MLB record.
Ken Griffey Jr, had 611 career home runs as of March 2009.
Griffey's two-run homer off Los Angeles' Eric Milton in the third inning was his ninth of the 2009 season and the 620th of his career. The Seattle Mariners beat the Dodgers 5 to 1.
Ken Griffey Jr. was 30 years old when he hit his 400th home run.
Ken Griffey Jr. hit 19 home runs in 2009, and 18 home runs in 2008.