Charlotte’s Coca-Cola 600 is a race for champions. All but three NASCAR Sprint Cup titleholders from 1993 through the present have a least one victory in the season’s longest race. Among the missing – surprisingly – is three-time champion Tony Stewart, whose only Charlotte victory came in the track’s 2003 fall race. Stewart has just one Coca-Cola 600 top-10 finish – sixth in 2007 – in his most recent eight races. His best finish, third, came in 2001. Reigning NASCAR Sprint Cup champion Brad Keselowski also searches for his first Coca-Cola 600 victory. Keselowski finished fifth a year ago in his third 600 start. Terry Labonte, the 1996 series champion, is the third. He won the fall 1996 race at Charlotte, but never the 600-miler.