SHEBOYGAN, Wis. — Phil Mickelson revealed Tuesday he has psoriatic arthritis, which causes his immune system to attack his joints and tendons and produced such intense pain he couldn't walk. He noticed the first symptoms five days before the U.S. Open, and the pain eventually got so bad he made a visit to the Mayo Clinic.

Weekly shots have brought the disease under control.

LEADVILLE, Colo. — Lance Armstrong has pulled out of the Leadville Trail 100 mountain bike race in Colorado, a high-altitude race he won in record time last year.Armstrong spokesman Mark Higgins said that the cyclist is still feeling lingering effects of a hip injury.

RALEIGH, N.C. — Former Olympian Antonio Pettigrew, a sprinter stripped of a gold medal after admitting to doping, was found dead in the backseat of his locked car.Authorities said they are unsure if his death was accidental or a suicide.

STATE COLLEGE — Penn State football coach Joe Paterno has been nominated for the highest civilian award in the country.Congressmen said the Hall of Fame coach deserves a Presidential Medal of Freedom for his service to the university and the State College community.