IndyCar says Will Power did not suffer a concussion before the season-opening race at St. Petersburg and was instead likely suffering only from an inner ear infection.
Power was a late scratch from Sunday's race because symptoms he was displaying were indicative of a concussion. He had crashed two days earlier during a practice session, and was sick after winning the pole on Saturday.
IndyCar examined him the morning of the race and determined Power had a mild concussion.
IndyCar says an evaluation at the University of Miami Concussion Program showed no evidence of a concussion. Power passed the Immediate Post-Concussion and Assessment and Cognitive Test and an MRI was normal.
Power has been cleared to resume racing. IndyCar's next event is March 27 at Phoenix International Raceway.