Sprint Cup | Jamie McMurray wins at Talladega; Johnson in Chase Lead
By Reid Spencer, NASCAR Wire Service TALLADEGA, Ala.—Enter the interloper. In a race dominated early by Matt Kenseth and later by fellow title contenders Jimmie Johnson and Dale Earnhardt Jr., Jamie McMurray got to the front at the right time, led the last 15 laps and grabbed victory in Sunday's Camping World RV Sales 500 at Talladega Superspeedway. McMurray was out front, leading Earnhardt in the sixth Chase for the NASCAR Sprint Cup race of the season, when a slight tap from Ricky Stenhouse Jr.'s Ford sent Austin Dillon's Chevrolet spinning into the outside wall on the backstretch. Impact from Casey Mears'…