On Aug. 31, 1990, Ken Griffey Jr. and Sr. became the first father

Happy Birthday to the Kid, by Mariners PR

On This Day In Sports: August 31, 1990: Griffey Sr. and Jr. Become the First Father/Son Duo to Play Together in The Majors

ESPN on X: On this date in 1990, Ken Griffey Sr. and Ken Griffey Jr. became the first father-son duo to play for the same team. / X

Ken Griffey Sr. and Jr. become first father/son combo to appear in the same lineup

On this date: Ken Griffey Sr. and Jr. play in same game for first time

Bobby and Barry Bonds, Ken Griffey Jr. and Ken Griffey Sr.: Baseball fathers and sons – New York Daily News

Griffey Jr. hits 500th home run on Father's Day

Bobby and Barry Bonds, Ken Griffey Jr. and Ken Griffey Sr.: Baseball fathers and sons – New York Daily News

Ken Griffey Sr. and Jr. become first father/son combo to appear in the same lineup

DraftKings on X: On Aug. 31, 1990, 40-year-old Ken Griffey Sr. and 20-year-old Ken Griffey Jr. became the first father and son to play as teammates in an MLB game. Griffey Sr.

On Aug. 31, 1990, Ken Griffey Jr. and Sr. became the first father-son teammates in MLB history

ESPN Stats & Info on X: On this date in 1990 Ken Griffey Jr. and Sr. became the first father-son duo to play on the same team (Mariners), with both singling in

Timeline: Career highlights of Ken Griffey Jr. - Sportspress Northwest

Reds' deal for Griffey rocked baseball world