In his first 11 seasons with Seattle (1989–1999), Griffey established himself as one of the most prolific and exciting players of the era, racking up 1,752 hits, 398 home runs, 1,152 runs batted in, and 167 stolen bases. He led the American League in home runs for four seasons (1994, 1997, 1998, and 1999), was voted the A.L. MVP in 1997, and maintained a .297 career batting average. In his first major league at-bat, he doubled.
On June 23, 2009, at Safeco Field, Griffey hit the 5,000th home run in franchise history, off San Diego Padres pitcher Chad Gaudin. This was Griffey's 619th career home run. On July 1, Griffey hit career home run 621 at the new Yankee Stadium, off Yankees pitcher Andy Pettitte in the sixth inning. It marked the 44th different ballpark in which he had hit a home run.[91] On August 12, 2009, against his former team, the Chicago White Sox, he hit a run-scoring single in the bottom of the 14th inning to win the game, 1–0, for the Mariners.