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

WATCH: 9-plus great moments in Junior's career

Vladimir Guerrero Jr completes father-son double with Home Run Derby title, MLB

ESPN Stats & Info on Twitter: On this day in 1990, Ken Griffey Jr. and Ken Griffey Sr. hit back-to-back home runs against the California Angels. They were the first father-son duo

VERY HARD TO FIND .

Seattle Mariners KEN GRIFFEY JR. & SR. Father & Son Home Runs Bobblehead NIB!

VIDEO: Never Forget Griffeys Becoming Only Father-Son Duo to Hit Back-to- Back Dingers

Griffey hits No. 600, News

WATCH: Father & son Griffey hit back-to-back HRs

Ken Griffey Jr., Mike Piazza elected to baseball Hall of Fame

Hall focus next year turns to Griffey, Hoffman and Wagner

Ken Griffey Jr. retires from baseball on June 2, 2010, ending the most accomplished and celebrated career in Seattle Mariners history.

Happy Father's Day: A look back at Ken Griffey Jr.'s 500th home run

Ken Griffey Jr. Claims Yankees Discrimination Kept Him Away