Denny Hamlin won his second straight Sprint Cup race Sunday, holding off Jeff Gordon in a green-white-checkered finish at Atlanta Motor Speedway.Martin Truex Jr. appeared to be positioned for his first win since 2007 until Jamie McMurray smashed the wall on the front straightaway, bringing out a caution with three laps to go. The leaders went to pit road, and Hamlins crew got him back on the track first, just ahead of Truex.While Truex struggled to get up to speed on the restart, Hamlin pulled away with Gordon right on his bumper.Hamlin took the series victory lead with four, putting him in position to top the standings when the 12-drive Chase starts.