On Aug. 31, 1990, Ken Griffey Jr. and Sr. became the first father-son teammates in MLB history
Like Father, Like Son: The Griffeys and other sports family dynasties
The best of 'The Natural,' Ken Griffey Jr. - Sportspress Northwest
August 31, 1990: Ken Griffey Jr. and Sr. get back-to-back hits in father-son debut with Mariners – Society for American Baseball Research
Which duo was the first ever father-son pair to play on the same team?
Greatest Father-Son Duos in MLB History
In 1990, the Griffeys became the first father-son pair to play in the same Major League lineup
In 1990, the Griffeys became the first father-son pair to play in the same Major League lineup
Roster of the Month: Fathers, Sons, and Brothers - Off The Bench
WATCH: Father & son Griffey hit back-to-back HRs