Ken Griffey Jr. is a former professional outfielder. Griffey was the number one overall selection by the Seattle Mariners during the Major League Baseball Amateur Draft held in June 1987.

Griffey Jr. played 22 years in the MLB. He spent most of his career with the Seattle Mariners and Cincinnati Reds, along with a short stint with the Chicago White Sox. A 13-time All-Star, Griffey is one of the most prolific home run hitters in baseball history. His 630 home runs rank as the seventh-most in MLB history, as of 2021. Griffey was also an exceptional defender and won 10 Gold Glove Awards in center field. Also as of 2021, he is tied for the record of most consecutive games with a home run (eight, with Don Mattingly and Dale Long).

Griffey Jr.’s popularity reflected well upon MLB and is credited by some with helping restore its image after the 1994 labor dispute. Following his playing career, Griffey joined the Mariners' front office as a special consultant In 2016, Griffey was elected to the Baseball Hall of Fame, receiving 99.32% of the vote, breaking pitcher Tom Seaver's record of 98.84%.