Brian Cormac O'Neill (born September 15, 1995) is an American football offensive tackle for the Minnesota Vikings of the National Football League (NFL). He played college football for the Pittsburgh Panthers.O'Neill switched from tight end to offensive tackle in July 2015. Minus the first game of the 2015 season, O'Neill started every game for Pittsburgh from 2015-2017 (37 consecutive starts). In 2016 he was named to the All-Atlantic Coast Conference (ACC) Third-team[4] and in 2017 the All-ACC First-team. After 2017, his redshirt junior season, he declared for the 2018 NFL draft.