The Crimson (6-1, 3-1 Ivy League) held a 13-0 lead in the second quarter as Conner Hempel ran for a nine-yard score and Flesher kicked two field goals.
Ricky Zorn threw a 32-yard strike to Andrew Berg on a trick play and Harvard converted the 2-point conversion. Dartmouth knotted it up with a seven-yard score by Kyle Bramble late in the third quarter.
Harvard drove 56 yards on 13 plays before setting up Flesher's game-winner with 48 seconds remaining.
LSU added to its future running back group by picking up a commitment from the playmaking Edwards-Helaire.
Check out the final seconds of Duke's win over Virginia, with the Cavaliers' Malcolm Brogdon scoring a go-ahead layup, followed by Grayson Allen driving to the other end to score an off-balance bucket at the buzzer.
John Lattner, the 1953 Heisman Trophy winner who helped lead Notre Dame to a 9-0-1 record and a No. 2 ranking in Frank Leahy's final year as coach, has died. He was 83.
Jabbar Juluke, the former running backs coach at Louisiana Tech who spent just one month at Texas Tech, will assume the same role on Les Miles' staff at LSU.
Corey Robinson is returning for his senior year on the gridiron at Notre Dame while also assuming the responsibilities of student-body president.
Baylor will hire more counselors and provide additional training for faculty in an effort to improve the school's response to sexual assault incidents, school regents said Friday.