by Ralph D. Russo, Associated Press NEW YORK, N.Y.—Pete Nance made a jumper at the buzzer to force overtime, RJ Davis iced a much-needed victory for scuffling North Carolina with two late free throws and the Tar Heels beat No. 23 Ohio State 89-84 on Saturday in the CBS Sports Classic. Armando Bacot had 28 points and 15 rebounds and Caleb Love scored 22 for North Carolina (8-4), which is trying to right itself after a four-game losing streak — all away from home — knocked the preseason No. 1 team out of the Top 25 two weeks ago. UNC has now won three straight, but none better than this one agai…