On May 14, 2022, the 32-year-old WBO super-welterweight champion, Brian Castaño (17-0-2, 12 KOs), and the 31-year-old WBA (Super), WBC, IBF, and The Ring super-welterweight champion Jermell Charlo (34-1-1, 18 KOs) faced each other for the undisputed world championpionship.
Castaño came in to the fight after a draw in his last fight with a 63% KO rate, and was fighting after a gap of 9 months and 27 days. Charlo was on a 0-fight win streak with a 50% KO rate, and fighting after a layoff of 9 months and 27 days.
In the rematch, Jermell Charlo stopped Brian Castaño via KO in the 10th round and unified the WBO, WBA (Super), WBC, IBF, and The Ring super-welterweight titles. Charlo improves his record to 35-1-1 (19 KOs), while Castaño adds a loss to his record at 17-1-2.