Rocker Ozzy Osbourne is back on tour after a brief health scare at the weekend. The Black Sabbath star, 58, was treated at a Denver, Colorado hospital for "a minor outpatient procedure" on Saturday night (28Jul07). He was discharged on Sunday (29Jul07) before heading to Kansas City, Missouri, where he is scheduled to perform on Monday (30Jul07) as part of the annual Ozzfest tour. A statement from his management reads, "Ozzy Osbourne had a minor outpatient procedure at Rose Medical Center late last night. He was released early this morning and is doing well." Osbourne's ailment has not been disclosed, but Kusa-TV reports he underwent surgery for a blood clot after complaining of leg pain.