Sugar Shane Mosley's fight with Zab Judah on May 31 was canceled Thursday after Judah seriously injured his arm in an accidental fall.

Judah (36-5, 25 KOs), the former undisputed welterweight champion hoping for a career comeback, severely cut his right forearm and needed 50 stitches to close the wounds, which will keep him out of training for four weeks.

"It is very unfortunate that Zab suffered this injury and that this great event had to be canceled," Golden Boy Promotions CEO Richard Schaefer said. "We are already in discussions with all parties involved to attempt to reschedule the fight for the near future."

Mosley (44-5, 37 KOs), the respected former three-division champion, lost a competitive unanimous decision to Miguel Cotto in his last fight on Nov. 10. When he couldn't nail down a rematch with WBA champion Cotto, Mosley settled for Judah in a nontitle bout at the Mandalay Bay Event Center in Las Vegas.