Ken Griffey Sr. and Jr. make history! They hit BACK-TO-BACK home

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

The best of 'The Natural,' Ken Griffey Jr. - Sportspress Northwest

Ken Griffey Sr. and Ken Griffey Jr. Make Father-Son History With Back-to-Back Home Runs - FanBuzz

Ken Griffey, Jr., Biography, Statistics, & Facts

Ken Griffey Jr. and Sr. on Baseball, Cancer and Hall of Fame Speeches

On Sept. 14, 1990, Ken Griffey Jr. and Ken Griffey Sr. made history, as they became the first father and son to ever hit back-to-back home runs. Happy Father's Day! : r/mlb

Ken Griffey Jr.'s hall of fame election adds to Donora's roster of champions

KEN GRIFFEY SR. & JR BACK TO BACK HOMERUNS #kengriffey #kengriffeyjr #

August 31, 1990: Ken Griffey Jr. and Sr. get back-to-back hits in father-son debut with Mariners – Society for American Baseball Research

Ken Griffey Jr. and Sr. hit back-to-back home runs

Ken Griffey Jr. hits his first MLB home run

The 500 club