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PHOENIX (AP) _ Arizona Diamondbacks outfielder Luis Gonzalez underwent successful surgery Monday to repair his separated left shoulder and damaged ligaments.

Gonzalez, who will not play in the postseason because of the injury, experienced no complications, Michael Lee, the team's orthopedic surgeon, said Monday.

``Luis was alert and comfortable with minimal pain in the recovery room and will spend tonight in the hospital as part of his recovery,'' said Lee, who performed the procedure at the Biltmore Medical Mall in Phoenix. ``The area has been immobilized and we anticipate beginning aggressive therapy in about a month.''

Gonzalez was hurt Sept. 23 when he tried to make a diving catch during a game against St. Louis. Shortstop Tony Womack's knee hit Gonzalez's shoulder, and Womack cartwheeled over his teammate.

Gonzalez was batting .288 with 28 home runs and 103 RBIs at the time of the injury.

Last season, Gonzalez blooped an RBI single in the bottom of the ninth inning to beat the New York Yankees in Game 7 of the World Series and give Arizona the title.