Is this a boxing first???

Grover Wiley (30-9), he defeated Julio Cesar Chavez in 05', this was Chavez's last fight. He is now scheduled to fight Chavez Jr. next month... thought that was interesting and sorta cool, how many times has this happened before, fighting a father and son?

Joe Bugner fought Joe and Marvis Frazier

Jersey Joe Walcott knocked out Harold Johnson Sr. and Jr. in 3 rounds.

Kevin Nash holds wins over Dusty and Dustin Rhodes.

LOL @ ^^^

In MMA, Kazuki Okubo beat Kato Kung Lee Sr. and Jr., both by armbar.