Floyd Mayweather Jr. vs. José Luis Castillo II was a professional boxing match contested on December 7, 2002 for the WBC and The Ring lightweight titles.

The fight's promoter Bob Arum, while not necessarily saying Mayweather didn't win, called the called the scoring for the fight, with Mayweather having won comfortably by five points on one scorecard and four points on the other two, "ludicrous" and vowed that he would attempt to schedule a rematch on August 10 at the Staples Center in Los Angeles with the bout being carried on HBO pay-per-view rather than on cable.

[3][4] In preparation for the rematch with Mayweather, Castillo took a tune-up fight with Verdell Smith, defeating him by third-round knockout in his native Mexico in early August.

Though Castillo was expected to be healed by October 19, Arum opted to move the fight to December so as to avoid competition from the 2002 World Series.

[9] At the end of the tenth round, Klitschko staggered McCline with a barrage of left hooks and overhand rights, and ultimately knocked him down with a left-right combination.