11:43 AM ET PHILADELPHIA — The junior middleweight division is as fun, interesting and unpredictable as any in boxing. This time it was unheralded Dominican Jeison Rosario who turned the 154-pound weight class on its head with his wholly unexpected fifth-round knockout of Julian “J Rock” Williams in what had been a very competitive action

12:24 AM ET Dan Rafael Close ESPN Senior Writer 2013 BWAA Nat Fleischer Award winner for excellence in boxing journalism ESPN.com boxing writer since 2005 Five years at USA Today Steve Kim Jeison Rosario, a 25-to-1 underdog, stopped Julian “J Rock” Williams in the fifth round in a major upset on Saturday night at the

12:27 AM ET Steve KimESPN A relatively tame and forgettable bout came to an explosive finish as light heavyweight Eleider Alvarez scored a seventh-round knockout of Michael Seals at the Turning Stone Resort and Casino in Verona, New York. The finish came near the end the round, with both men throwing right hands simultaneously, but

10:51 PM ET PHILADELPHIA — Jeison Rosario’s only defeat came against an opponent Julian “J Rock” Williams had beaten easily, but that meant nothing when they met each other. In a major upset, Rosario stopped Williams in the fifth round of Williams’ homecoming fight to take Williams’ unified junior middleweight world title in the Premier

8:15 PM ET Tyson Fury is just a month away from one of the biggest fights of the year in boxing — a rematch with Deontay Wilder on Feb. 22. But for one night, at least, his attention was turned to mixed martial arts and Conor McGregor. Fury was a guest on Ariel Helwani’s MMA

7:06 PM ET Steve KimESPN Eleider “Storm” Alvarez and Michael Seals will meet in a 10-round light heavyweight battle in the main event of Saturday’s Top Rank card on ESPN at Turning Stone Resort Casino in Verona, New York. But before that, some good fighters will showcase their skill on the undercard In the co-main

10:58 PM ET Steve KimESPN Felix Verdejo defeated Manuel Rojas by unanimous decision in a 10-round lightweight bout Saturday night, on the Eleider “Storm” Alvarez-Michael Seals undercard at Turning Stone Resort Casino in Verona, New York. All three judges gave the fight to Verdejo, with scores of 99-91, 97-93 and 98-92. This was Verdejo’s first

6:55 PM ET Contender Adam Kownacki will headline a night of heavyweights at his hometown arena, Barclays Center in Brooklyn, New York. Kownacki, born in Poland and a big draw in Brooklyn, where he has lived since he was a kid, will take on Robert Helenius in a world title elimination fight in the main

10:09 AM ET Floyd Mayweather and Canelo Alvarez, onetime rivals, will take home the biggest prizes in the annual Boxing Writers Association of America awards. In balloting results announced on Friday, Mayweather was voted winner of the Joe Louis Fighter of the Decade award and Alvarez, a fighter of the decade nominee, won the 2019

8:39 PM ET LAS VEGAS — Conor McGregor has headlined MGM Grand Garden Arena several times. He has been the main event at T-Mobile Arena, too. And now he could be eyeing a massive bout at Allegiant Stadium, where the Las Vegas Raiders are due to begin playing next season. McGregor said Thursday at a