King attended Manvel High SchoolinManvel, Texas. He began his sophomore year as the eighth-string quarterback, claiming the starting spot a few weeks after the first game.[2] During his senior season, he broke the career Texas 6A passing touchdowns record of 117 set by Kyler Murray the year before.[2] During his high school career, he passed for over 10,000 yards and rushed for over 3,000, throwing for 140 touchdowns and rushing for 48. He originally committed to Texas Christian University (TCU) to play college football but changed to the University of Houston.[3][4]
King entered his freshman year at Houston as a wide receiver after injuries plagued the receiving corps during fall camp.[5] He played in 10 games and made four starts, recording 29 receptions for 228 yards and a touchdown.
He played quarterback and receiver as a sophomore in 2017. After leading a comeback win against South Florida, he took over as the starting quarterback for the final four games of the season.[6] For the season, he completed 90 of 139 passes for 1,260 yards, seven touchdowns and two interceptions.[7] He also added 379 rushing yards with eight touchdowns and had 29 receptions for 264 yards and two touchdowns as a receiver. King entered 2018 as Houston's starting quarterback.[8][9]
His junior season was cut short when he suffered a non-contact knee injury in the eleventh game of the year.[10] On the season, he passed for 2982 yards, 36 touchdowns and 6 interceptions. He also rushed for 14 touchdowns; Kyler Murray and Dwayne Haskins were the only quarterbacks with more total touchdowns that year.[2]
King returned as starting quarterback for his senior season after recovering from the previous season's injury.[11] However, after the team's first four games, King announced he was going to redshirt for the remainder of the 2019 season.[12]
On July 1, 2021, NCAA student-athletes were allowed to receive compensation for use of their name, image, and likeness (NIL) for the first time, and King was one of the first athletes to take advantage of the new rules, signing deals with College Hunks Hauling Junk and a few local businesses to the Miami area.[15] He and Florida State quarterback McKenzie Milton became the co-founders and public faces of Dreamfield, a company specializing in booking live appearances for student-athletes. Dreamfield will also offer non-fungible tokens (NFTs), digital art works that cannot be duplicated and are purchased with cryptocurrency.[16]
On November 14, 2022, King was signed to the practice squad of the Carolina Panthers.[21] King was expected to be assigned to the DC Defenders of the XFL on November 15 before the signing occurred.[22] He was released on November 22.[23]
On December 12, 2022, King was assigned to the DC Defenders of the XFL after being released by the Panthers.[24] King did not sign a Letter of Intent to return in 2024.[25]
On June 8, 2023, King was hired by Southern Methodist University to serve as an offensive analyst.[26] On December 20, it was announced that King would be promoted to the position of quarterbacks coach.[27]
