Hill, the starting quarterback at Texas A&M for eight games in 2014, had been competing with third-year sophomore Foster Sawyer for the job. The No. 13 Horned Frogs open the season against South Dakota State on Sept. 3.
For Hill, earning the starting job is a major step in a comeback that began 19 months ago when he left Texas A&M.
Hill succeeded Heisman Trophy winner Johnny Manziel at A&M in 2014 and achieved immediate stardom as a sophomore, breaking the school's single-game passing record with 511 yards in a blowout road win over then-No. 9 South Carolina in his first career start.
He threw for 2,649 yards and 23 touchdowns on almost 67 percent passing during his stint as the Aggies' starting quarterback and led the team to a 5-0 start. But he was benched after a three-game losing streak capped by a 59-0 loss at Alabama.
Texas A&M coach Kevin Sumlin suspended Hill for the team's next two games for an unspecific violation of team rules, his second suspension of the year, and Hill never played another down for the Aggies. He was released from his scholarship in January 2015 and spent a semester at Tarrant County College in Fort Worth, Texas, before enrolling at TCU.
After spending the 2015 season on scout team as a transfer, Hill will now try to replace another record-breaking quarterback: Trevone Boykin. TCU's all-time leading passer won Big 12 Offensive Player of the Year and finished No. 4 in Heisman Trophy voting in 2014. The Horned Frogs are 23-3 over the past two seasons.