Marcos Ambrose missed his daughter's first day of school. She probably won't mind. The snakebitten Ambrose, deprived more than once of a NASCAR victory, beat Brad Keselowski and Kyle Busch on a two-lap dash to the checkered flag Monday to win the rain-delayed Sprint Cup race at Watkins Glen International. It was his first victory in 105 starts in NASCAR's top series and atoned for a slip-up a year ago on the road course at Sonoma, when he stalled his car under caution while leading with six laps to go and finished sixth. "I've tried for 2½ years," Ambrose said. "We're going to onward and upward from here. It's a proud day." Ambrose has won all three Nationwide races he's entered at Watkins Glen, and in three Cup starts here, he's notched one second and two thirds, including an impressive drive from last to third in 2008. Finally pulling into Victory Lane was a feeling like no other. Read more: http://espn.go.com/racing/nascar/cu...first-sprint-cup-win-watkins-glen-wild-finish