Haskins was selected by the Washington Redskins in the first round of the 2019 NFL draft, but was released after less than two seasons due to inconsistent play and questions over his work ethic.

[26] Despite his high school and college jersey number of 7 being unofficially retired by the Redskins in honor of quarterback Joe Theismann, whose career ended with a leg injury in 1985, Haskins requested and was granted permission from him to wear it.

[29] Haskins saw his first action with the team in a Week 4 game against the New York Giants in relief of Case Keenum, who was benched for poor performance.

[41] Haskins was benched in favor of Kyle Allen prior to the Week 5 game against the Los Angeles Rams due to coaches being unimpressed with his work ethic and performance.

[42][43] In October 2020, he was fined US$4,833 for breaking league COVID-19 protocols after making a reservation for a family friend at the team hotel in New York prior to a game against the Giants.

[47] Despite that, he started the Week 16 game against the Carolina Panthers but was benched for Taylor Heinicke in the fourth quarter after throwing 14 of 28 for 154 yards and two interceptions, finishing with a passer rating of 36.9 in a 20–13 loss.

[48] Haskins was released by the team the day after, with head coach Ron Rivera saying he believed that it benefited both parties if they went their separate ways.

[57] Haskins died as a direct result of injuries he sustained at around 7:00 a.m. EDT on April 9, 2022, after he was struck by a dump truck while attempting to cross I-595 near Fort Lauderdale, Florida, on foot.

[60][61] His wife, who was not traveling with him, received a call from Haskins after he had run out of gasoline for his rented vehicle, letting her know of his attempt to get more at a gas station prior to being struck.

[62] Haskins was knocked back several feet by a dump truck and either run over or struck a second time by an SUV that swerved in an attempt to avoid him.

[63] A toxicology report revealed Haskins had a blood alcohol level of .24 and had also tested positive for ketamine, oxymorphone, methamphetamine and norketamine.

[64] A lawsuit filed about the incident claims that Haskins was drugged and robbed by a group that contained one man and three women prior to his death.