LAS VEGAS - Ryan Burton catches up with Floyd Mayweather Jr., who promoted Saturday's Premier Boxing Champions card at the MGM Grand. Mayweather jokingly reprimands unbeaten welterweight Errol Spence, who accidently called Mayweather out in the his post-fight interview on NBC.

"Showtime" Shawn Porter (26-1-1, 16 KOs) outworked and out-landed Adrien "The Problem" Broner (30-2, 22 KOs) on his way to a unanimous decision victory on Premier Boxing Champions on NBC in front of 8,138 fans at the MGM Grand Garden Arena on Saturday night.

Porter relentlessly attacked the defensive-minded Broner with jabs and power shots to the body. Broner tried to slow down Porter by pushing and holding and was eventually deducted a point by referee Tony Weeks in round 11.

Showing the great power and heart that made him a three-time world champion, Broner came out strong in the 12th round and sent Porter to the canvas with a powerful left hook. Porter was able to recover and stay on his feet despite losing the round.

Porter was rewarded for his efforts with a unanimous decision by scores of 114-112, 115-11 and 118-108.

2012 U.S. Olympian Errol "The Truth" Spence Jr. (17-0, 14 KOs) remained undefeated and justified the talk of him as a future superstar by stopping Phil "The Italian Sensation" Lo Greco (26-2, 14 KOs) in the third round. The official stoppage coming 1:50 into the round.