Ozzy Osbourne [ tickets ] reportedly underwent minor surgery Saturday (7/28) in Denver following his performance at Coors Amphitheater in nearby Englewood, CO.

According to Denver's KUSA-TV, the rock icon was complaining of leg pain throughout the day, and underwent the surgery--to remove a blood clot--after his performance. He reportedly was released from the hospital Sunday morning (7/29).

Osbourne's management company issued a statement stating that Osbourne underwent a "minor outpatient procedure" at Denver's Rose Medical Center before heading to the Kansas City, MO, area to perform there at Monday's (7/30) Ozzfest [ tickets ] stop.

This year, the 12th annual installment of Ozzfest features namesake Osbourne on the main stage alongside Static X, Lamb of God [ tickets ] and Finnish band Lordi. The second stage features headliner Hatebreed [ tickets ], along with Behemoth, DevilDriver (who recently replaced Mondo Generator), Nile, Ankla, Circus Diablo, The Showdown, 3 Inches of Blood, Daath, Chthonic and In This Moment.

Ozzfest is scheduled to run through August.