Julio Cesar Chavez vs. Roger Mayweather (1st meeting)
1985-07-07 : Roger Mayweather 130 lbs lost to Julio Cesar Chavez 129¾ lbs by TKO at 2:30 in round 2 of 12
- Location: Riviera Hotel & Casino, Las Vegas, Nevada, USA
- Referee: Richard Steele
- Judge: Dimas Hernandez 10-9
- Judge: Mike Jacobs 10-9
- Judge: Sid Nathan 10-9
Mayweather punished severely in the second round by crushing blows from Julio Cesar Chavez. 2 knockdowns are counted, although Mayweather is off his feet four times in round 2.