ATLANTA – Aidan Birr hit a 55-yard field goal as time expired to help Georgia Tech upset No. 12 Clemson 24-21 in Atlantic Coast Conference play on Saturday.Haynes King completed 20 of 28 passes for 211 yards, and added 101 yards and a score on the ground for the Yellow Jackets (3-0, 1-0 ACC), who beat Clemson for the first time since 2014.Cade Klubnik completed 15 of 26 passes for 207 yards, a touchdown and an interception, while rushing for 62 yards and a score. Adam Randall rushed for 80 yards and a score, Bryant Wesco Jr. caught seven passes for 126 yards and a touchdown for the Tigers (1-2, 0-1 ACC), who trailed by 13 points in the first half.Trailing 13-7 after halftime, Clemson drove to Georgia Tech’s 9-yard line, before Klubnik’s pass was intercepted by Omar Daniels and returned to the Tigers’ 48.Following a Yellow Jackets punt, Klubnik connected with Wesco for a 73-yard score, giving Clemson its first lead at the 9:36 mark of the third.After Georgia Tech punted and fumbled on its next two drives, the Yellow Jackets regained the lead on King’s 1-yard rushing score – which finished off a 90-yard drive – with 10:02 left in the fourth. Georgia Tech’s ensuing two-point conversion pushed the lead to 21-14.Clemson answered with a 13-play, 75-yard drive, capped with Randall’s game-tying, 2-yard rushing score with 3:26 left, before King led Georgia Tech on a 10-play, 38-yard game-winning drive.Georgia Tech took the opening drive to Clemson’s 4-yard line, before King threw the ball away on third down and Ricardo Jones brought down Jamal Haynes for a loss of four, turning the ball over on downs.