TROY, Ala. (AP) _ Winston Cup team owner Jack Roush was critically injured when his small plane crashed Friday, NASCAR vice president Jim Hunter said.

Roush, whose 60th birthday was Friday, was in critical condition at UAB Hospital in Birmingham, Hunter said.

Roush owns the Winston Cup teams of Mark Martin, Jeff Burton, Matt Kenseth and Kurt Busch.

Roush has been a Winston Cup car owner since 1988, running Fords for Mark Martin that season. Martin has given Roush a pair of second-place finishes in the series points in 1990 and 1994.

During his tenure in NASCAR's top stock car series, Roush's team has won 53 races, including three of eight this season.