Zonovan Knight scored on a pair of touchdown runs and North Carolina State used a late blocked field goal to pull out a 15-14 victory and end No. 21 Liberty’s bid for an undefeated season Saturday night in Raleigh, N.C.N.C. State’s Vi Jones blocked a 39-yard field goal attempt from Alex Barbir with 1:18 remaining to preserve the lead. Knight tallied the go-ahead score on a 4-yard play with 6:53 remaining in the game.Liberty (8-1), which was trying to conquer its third Atlantic Coast Conference opponent of the season, had a 10-game winning streak dating to last season. The Flames ended one victory shy of tying the school record.The Flames began the potential winning drive on their own 8-yard line.Liberty quarterback Malik Willis was 13-for-32 for 172 yards, two touchdowns and three interceptions.Knight rushed for 96 yards on 14 carries.Bailey Hockman was 14-for-27 for 154 yards and one interception for the Wolfpack (6-3), who were playing their lone nonconference game of the season. N.C. State is 2-3 vs. ranked opponents this year.State freshman Aydan White made his first career interception on a diving pick to give the Wolfpack the ball at the Liberty 26-yard line in the fourth quarter. The Wolfpack converted, including a third-down pick-up on Hockman’s scramble, en route to taking the lead for the first time in the second half.After Knight’s run put N.C. State on top, a two-point conversion play failed.N.C. State was held to 110 yards of total offense in the second half after posting 210 in the first half. The Wolfpack overcame a season-high 123 penalty yards.