Last season, Swoopes played in 12 games, taking over as the Longhorns' starter in Week 2 after an injury to David Ash. Swoopes completed 58% of his passes, throwing 13 touchdowns and 11 interceptions. He also ran for 262 yards and four scores.
Swoopes also saw limited playing time in 2013.
Heard, a dual-threat quarterback, was a four-star recruit in the class of 2014.
Texas will take on the Fighting Irish on Sept. 5 in South Bend.
- Rohan Nadkarni