OAKLAND, Calif. (AP) — Golden State guard Monta Ellis will be sidelined for at least three months after severely spraining his ankle during an offseason workout, forcing the Warriors to start the season without the player expected to lead their revamped roster this fall.

Ellis, who got a six-year contract extension worth $66 million on July 24, sprained his ankle and tore a deltoid ligament while working out in his hometown of Jackson, Miss., last Thursday, said Chris Mullin, the Warriors' top basketball executive.

Ellis underwent surgery Wednesday in Birmingham, Ala., to repair the ligament, and returned home later in the day. Ellis' ankle will be immobilized for six weeks, followed by at least six weeks of off-court rehabilitation before the guard can return to basketball workouts.

"He's one of our main guys, but we don't think it's a season-ending injury," Mullin said. "The time frame, it fluctuates, but hopefully with his youth — and he's been pretty durable and resilient to injury — hopefully he does get back (soon).