Arnold Barboza Jr. KO3 Mike Alvarado... At Los Angeles' Staples Center, junior welterweight Arnold Barboza Jr. put an ex-champion on his resume, dismantling a faded Mike Alvarado in three rounds. Barboza (20-0) knocked down the former WBO junior welterweight champion in round three. Alvarado tried to pul himself up using the ropes, fell back down, barely beat the count but stumbled badly. The stumble comvinced the referee to stop the bout. Alvarado had a six-fight win streak against modest opposition snapped, and 40-5 it might be time for him to retie. source: espn+