© Getty Images Enlarge Shane Mosley has yet to decide his future in boxing

Former rugby league player Anthony Mundine scored a sixth-round technical knockout over Shane Mosley in their WBA international super welterweight title fight, the first time the American has been stopped inside the distance.

Mosley, a 42-year-old with a record of 47-9-1, decided to retire before the seventh round due to back spasms. He said he would decide after he returns to the US whether he would retire.

"What's done is done," Mosley said when asked whether he would fight again.

The 38-year-old Mundine improved to 45-5 with 26 knockouts at Homebush in western Sydney. Mundine was leading 58-56 on two cards and 60-55 on the third.

"I was in killer mode, but my heart goes out to Shane, I know he's a winner," Mundine said. "He's not one to pull out for nothing. He's one of the greatest fighters to have ever lived."

The fight was delayed for five weeks over financial issues.

The contest was refereed by American Raul Caiz Sr, who has controlled two of Mundine's past bouts and one of Mosley's. Caiz stopped the fight on the recommendation of fight doctor Lou Lewis.

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This article first appeared on ESPN.com

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