He played college basketball for the Arkansas Razorbacks and is most notably remembered for his go-ahead slam dunk with 0.2 seconds left in overtime against Kentucky in 2014.

Qualls attended Huntington High School where he led them to four district championships, including a senior season in which he averaged 17.8 points per game, guiding Huntington to 33 wins, making him the third-ranked player in the state of Louisiana in the class of 2012, with an ESPN.com scout grade of 89.

Qualls is perhaps best known for his slam dunk at the buzzer to beat Kentucky 87–85 in overtime at Bud Walton Arena on January 14, 2014.

[1][2] During a workout with the Phoenix Suns prior to the 2015 draft, Qualls tore his ACL and was ruled out for six to 12 months.

[3] Despite the injury, Qualls managed to land an NBA training camp deal, signing with the Oklahoma City Thunder on September 29, 2015.

[7] On October 10, 2016, he made his professional debut in a 77–61 loss to Hapoel Holon, recording 15 points, five rebounds and one assist in 25 minutes off the bench.

[21] In February 2024, Qualls joined the Borneo Hornbills of the Indonesian Basketball League (IBL) to replace Travion Leonard.