Mast steps down from Donlavey Racing.

Hermie Sadler will replace ailing driver Rick Mast this weekend in the Donlavey Racing Ford Taurus, according to car owner Junie Donlavey.

Mast said he has not felt good physically for several weeks and is undergoing tests to determine the cause. The doctors have recommended he step out of driving at least for this weekend's Coca-Cola Racing Family 600 at Lowe's Motor Speedway. Mast competed in The Winston qualifying races last Saturday night at the Charlotte track.

Donlavey said Sadler was a natural choice to drive the car this weekend at Charlotte. The team is billed as an all Virginia team. Donlavey's Winston Cup team has called Richmond, Va., home for six decades, and C.F.Sauer's Company is also located in Richmond. Sadler is a native of Emporia, Va., and races occasionally on the Winston Cup Series with a team he owns.