Sprint Cup | Opportunistic Keselowski wins Chase race at Charlotte
By Reid Spencer, NASCAR Wire Service CONCORD, N.C.—Brad Keselowski proved once again Saturday night that quality and timing trump quantity. Keselowski led 11 laps in Saturday night’s Bank of America 500 at Charlotte Motor Speedway. Kasey Kahne led 138. Five-time champion Jimmie Johnson led 130. But Keselowski overcame a loose wheel and a jack that spent a lap under the side of his car to win the fifth race in the Chase for the NASCAR Sprint Cup, as a late caution squelched Johnson’s march toward the series lead. Keselowski, the reigning series champion, won for the first time this season, the first…