Championship contenders and big-name stars were dropping left and right on a wacky Saturday night at Iowa Speedway. Ryan Hunter-Reay kept his car clean, made a late move and not so quietly forced himself into the championship discussion. Hunter-Reay passed Scott Dixon with 12 laps to go and held on to win for the second straight week in a race that ended under caution. The winner last week at another short oval, the Milwaukee Mile, Hunter-Reay moved to second in the season standings with his seventh career IndyCar victory -- the most among active U.S. drivers. The victory was Andrettti Autosport's fourth in six races in Iowa.