After graduating from Weddington Keith became an Iowa Hawkeye and through 10 games has made 8 of 9 field goals. The biggest field goal was the game-winning 33-yard field goal that propelled the University of Iowa football team to a stunning 14-13 walk-off victory over No. 3 Michigan on Saturday night in front of a sold-out Kinnick Stadium. With three seconds remaining, Michigan tried to ice Duncan but it didn't work and he split the uprights to send Kinnick Stadium into pandemonium.
At Weddington Duncan Named All-UCHSF 1st team as a junior and senior as well as being named SCC Special Teams Player of the Year as a senior. Duncan scored 367 career points while helpling the Warriors win three conference titles in four seasons. Duncan connected on 22-of-29 field goal attempts as a senior and made all 60 PAT attempts while scoring 126 points. As a junior made 17-22 field goal attempts, with a long of 48 yards, and 60-62 PAT kicks while scoring 111 points. He scored 73 points as a sophomore, making 7-9 field goals and all 52 PAT attempts as a freshman made all five field goal attempts and 42-45 PAT kicks, with three blocks, while scoring 57 points. Keith holds NC state records for consecutive PATs (104), season field goals (22), career field goals (51), and most field goals over 50 yards in a season (5). He holds Union county records for season and career field goals, season and career scoring, and season and career touchbacks.