John Bailey Theus (born January 19, 1994) is a former American football offensive tackle. He played college football at the University of Georgia.

A native of Jacksonville, Florida, Theus attended Bolles School where he was coached by Corky Rogers. As a sophomore, he was part of a 12–1 Bolles Bulldogs team led by running back Jawan Jamison that defeated Tampa Catholic for the 2009 FHSAA Class 4A state title. In his junior season, Bolles went undefeated through the regular season, only to lose 35–21 to Ocala Trinity Catholic in the Region 1-2B championship.^[1] In Theus' senior season, Bolles went 16–1 and beat Miami Washington for the second Class 4A state title in three years.^[2] After the season, Theus played in the U.S. Army All-American Bowl and was also named All-American by Parade and USA Today.

Regarded as a consensus five-star recruit, Theus was ranked as one of the best offensive tackle prospects of the class of 2012, which also included Zach Banner, D. J. Humphries, and Andrus Peat.^[3] With scholarship offers from almost every major program in the country, Theus chose Georgia over Notre Dame, Florida, Texas, and Alabama.^[4]

In his true freshman season at Georgia, Theus started all 14 games at right tackle.^[5] He was only the third true freshman to start at offensive tackle in a season opener for Georgia since freshmen became eligible in 1973, and the first since Trinton Sturdivant in 2007.^[6] After a solid season in which Georgia ranked No. 1 in the Southeastern Conference (SEC) in yards per play, Theus was named Freshman All-American by CBSSports.com,^[7] The Sporting News,^[8] and Phil Steele. As a sophomore, Theus lost his starting job for stints when Kolton Houston returned to the team after having his eligibility cleared by the NCAA.^[9] Theus played in all 13 games of the season, starting eight of them.

For his junior season, Theus was moved over to left tackle where he started in all 13 games. He was part of an offensive line that helped Georgia rush for 257.8 yards per game, which ranked first in the SEC. Theus earned Associated Press Honorable Mention All-SEC after the season. For his senior season Theus started all 13 games, 9 at left tackle, 4 at right tackle. Theus was named All SEC 1st team. Theus finished his career being named all around team captain.