Stick was drafted by the Los Angeles Chargers in the fifth round with the 166th overall pick in the 2019 NFL draft.[5] In the 2019 season, Stick took snaps in the preseason, but did not appear in any games in the regular season.
During the beginning of the 2020 season, Stick was expected to take over the backup quarterback position, replacing Tyrod Taylor.[6] Instead, Chase Daniel was signed on as a backup while Stick was not set to play.[6]
During Week 3 of the 2020 regular season, Stick briefly entered the game after starting quarterback Justin Herbert was apparently injured. Before Stick could take the first snap of his career, however, the Chargers called a timeout and substituted Herbert back into the game.[7] Stick’s first action came later that season in Week 7 when Herbert was briefly taken out due to injury. He completed a pass for four yards and had a rush for negative two yards before Herbert came back in the game.[8]
2023–2024
On March 13, 2023, the Chargers re-signed Stick to a one-year deal, keeping him as a backup for Herbert.[9][10]
In Week 14, Stick was substituted for Herbert who suffered a finger injury in the second quarter. In his first game played since 2020, Stick threw for 179 yards in a 24–7 loss to the Denver Broncos.[11][12]
On December 12, the Chargers announced that Stick would take over as the starter after it was revealed Herbert would need season-ending surgery.[13] He started in four games to close out the 2023 season, all losses for the Chargers. Overall, he passed for 1,129 yards, three touchdowns, and one interception to go with a rushing touchdown.[14]
Stick re-signed with the Chargers on March 16, 2024.[15]