Kyle Larson beat Chris Buescher to the line at Kansas Speedway on Sunday in the closest finish in NASCAR history. The official winning margin for the Cup Series race Sunday was a thousandth of a second. A caution flag forced a green-white-checkered finish, and Larson pulled behind Buescher on the backstretch of the final lap, then came around him through the final corner. The two cars banged doors as they headed for the stripe. Martin Truex Jr. finished fourth and Denny Hamlin, who had the lead on the final restart, faded back to fifth. The win was Larson’s second of the season.