Roush Fenway Racing said Thursday it's still unclear when Roush will return to the race track.
Roush was attending an air show in Oshkosh, Wis., late last month. He was at the controls of a small plane that crashed while trying to land.
He was able to walk away from the crash. His passenger was treated and released from a hospital the next day.
Roush was released from the Mayo Clinic in Rochester, Minn., on Wednesday. He says he's grateful for the outpouring of support and concern he received.
Roush Fenway Racing: http://www.roushfenway.com/