LAS VEGAS — Keith Thurman won a piece of the welterweight title Saturday night with a bruising decision win over Robert Guerrero in the debut of a new prime-time boxing series on network television.

Thurman and Guerrero waged a battle that had fans on their feet in the final rounds and gave a much needed boost to boxing in the first prime-time fights on NBC in 30 years. The fight was the highlight of a package that also included a win by Adrien Broner over John Molina in a super lightweight bout.

Thurman knocked Guerrero down in the ninth round and won easily on all three ringside scorecards. But Guerrero fought hard and wasn't afraid to trade punches even while bleeding from a cut over his left eye late.