Quigley hits back with KO
An injured right hand kept him out of the ring for a year, but it was Jason Quigley's left paw that powered him to his latest KO.
Quigley stopped the durable Daniel Rosario with a savage left hook to the body nine seconds from the end of the sixth round in Quincy, outside Boston.
It was the first time in a 15-fight pro career that Rosario had been stopped, the Puerto Rican given a vicious ending on his 30th birthday.
"He looked weak to the body and that was the game plan," Donegal fighter Quigley said.
"The right hands were working to the body. I landed a few and heard him wincing. The left hook to the body came out of nowhere. It's not a shot I normally have."
Golden Boy Promotions prospect Quigley moved to 14-0, with 10 KOs, in his first bout under new trainer Dominic Ingle.
Quigley's former Irish amateur team-mate Ray Moylette improved to 9-0, 3KOs, with a points win over Matt Doherty.
Moylette had a magnificent fifth round and looked on course for a stoppage at that time.
The judges all gave the bout to Moylette on 59-55, 59-55, 58-54 scores.