NC State was in prime position to continue the upset watch it placed No. 3 Clemson on through two-plus quarters Thursday night, but an iffy call against the Wolfpack could render that moot.

On the first play of a drive beginning at 7:43 in the third quarter, NC State running back Bryan Underwood broke loose down the right sideline and appeared to break what would've been an 83-yard touchdown run and, presumably, a 14-13 Wolfpack lead. Instead, referees ruled Underwood stepped out of bounds at Clemson's 47-yard line, limiting the run to 36 yards.

The play was never reviewed, and ESPN's Rece Davis shortly thereafter provided the official rule explanation that out-of-bounds calls outside the five-yard line can't be reviewed.

Underwood's run would've been a fine enough play, except that NC State quarterback Pete Thomas fumbled away the ball after being sacked three plays later on a 3rd-and-10 from that spot. Clemson recovered, and five plays later, quarterback Tajh Boyd found wide receiver Martavis Bryant for a 30-yard touchdown pass, a 20-7 lead and a 14-point swing.

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