However, Lattimore scored on a two-yard touchdown run late in the fourth to give the Gamecocks a 35-21 victory.
Parker then scored the final points of the game in the fourth with his two-yard touchdown run for the 23-14 win.
It was Singleton who rushed for a two-yard touchdown that made the score 10-7.
Bethpage scored first in overtime on a two-yard touchdown run by Ed Franco, who then missed the extra point.
The drive culminated in a two-yard touchdown to Amani Toomer with five seconds remaining.
Two plays after that, George sliced over untouched for a two-yard touchdown to make it 21-3.
Michigan added more points with a two-yard touchdown run by Fitzgerald Toussaint.
He rushed for a season-high 39 yards on 18 carries and ran for the game-winning two-yard touchdown.
He finished second in rushing for Northwestern with 20 carries for 34 yards and a two-yard touchdown.
They responded with a two-yard touchdown run by Mario Grier.