IndyCar gave Jack Hawksworth the go-ahead to drive this week at Iowa after he was forced to sit out a 500-mile race last Sunday at Pocono because of a heart contusion.
Hawksworth was hurt in a practice crash on Saturday at Pocono. After he was released from the infield medical center, he fell ill and was taken to a hospital in nearby Allentown, Pa., where the bruise was discovered and he remained overnight for observation before being released Sunday.
Dr. Michael Olinger, the Verizon IndyCar Series' medical director, cleared the British driver to return to racing this week.
A 23-year-old rookie on the open-wheel circuit, Hawksworth has compiled three top-10 finishes this season.
The Iowa Corn Indy 300 is scheduled for Saturday at Iowa Speedway in Newton, Iowa.