"There are injuries. Possible surgery," Roush Fenway Racing president Geoff Smith said in a text message to The Associated Press. "But he walked out of the plane."
Smith confirmed that the plane belonged to Roush, and he was flying it. Smith said Roush's injuries include facial lacerations.
Roush, an aviation buff, was attending the Experimental Aircraft Association's annual AirVenture in Oshkosh, Wis., this week.
In a statement on the EAA Web site, officials said a Beechcraft Premier business jet registered to Roush Fenway Racing, LLC was involved in a landing accident at Wittman Regional Airport in Oshkosh.
The accident occurred at approximately 6:15 p.m. CDT, the statement said.
According to the EAA, the National Transportation Safety Board and Winnebago County Sheriff's Department confirmed that two occupants on board were Roush and Brenda Strickland of Plymouth, Mich.
"Each exited the aircraft following the accident," the statement said. "Both were transported to local hospitals, with Roush in serious but stable condition and Strickland with non-life threatening injuries. The NTSB is leading the investigation into the accident."
It is the second close call for Roush, who crashed a plane into a pond in Alabama in 2002 and was rescued by an ex-Marine who lived nearby. Roush continued flying after that accident.
Roush owns several aircraft, including a World War II-vintage P-51 Mustang.