MARTINSVILLE, Va. — Jimmie Johnson raced to his seventh career Martinsville Speedway victory to take the season points lead with three event left, holding off Kyle Busch on a restart with five laps to go Sunday. The five-time series champion moved two points ahead of Brad Keselowski, who finished sixth for his highest career finish at the track. "I know this championship's going to come down to Homestead," Keselowski said.