In the school hallways, he caught the attention of football coach D'Arcy McCardle who "was struck by the student's big frame and thick legs.

[10] Hajrullahu received scholarship opportunities from across Canada and narrowed his choice down between Western and Queen's University, choosing the former.

[16] In 2011, Hajrullahu was selected as part of the Canada national football team,[17] which competed at the 2011 IFAF World Championship in Austria.

[29] On November 26, Hajrullahu kicked the game-winning field goal to secure a win in the 105th Grey Cup for Toronto at TD Place Stadium.

[33] During the 2018 season, Hajrullahu converted 85% of his field goals, while the Ti-Cats advanced in the playoffs to the East final before being eliminated.

Despite receiving NFL interest, including a workout with the Seattle Seahawks, Hajrullahu took his time in choosing a team for 2019; he eventually signed a 2-year contract to return to Hamilton after six weeks of free agency.

[38] On April 13, 2020, Hajrullahu signed a contract with the Los Angeles Rams of the National Football League (NFL).

[39] It was exactly a day short of 21 years, when on April 14, 1999, Hajrullahu and his family were forced out of their village due to the Kosovo War.

[40] Hajrullahu received interest from five teams at the NFL combine in March in Arizona, which he had been attending every year since his days playing for Winnipeg.

[43] In November 2020, Hajrullahu signed with the Generals of The Spring League (TSL) and played in their inaugural fall season.

[44][45] On December 9, 2020, Hajrullahu was signed to the Carolina Panthers' practice squad,[46] but was released six days later due to a work visa problem.

[52] On August 18, 2021, Hajrullahu signed with the Dallas Cowboys after the team released punter and emergency kicker Hunter Niswander, who had been filling in at placekicker for an injured Greg Zuerlein.

[53] In Week 10, he replaced Zuerlein, after he tested positive for COVID-19, making all five of his extra points and did not attempt a single field goal against the Atlanta Falcons.

[54] On December 22, 2021, following the injury of Zane Gonzalez in pre-game warmups in Week 15, the Panthers signed Hajrullahu off Washington's practice squad.

[58] On August 9, 2022, Garibay was waived and the Cowboys signed free agent Brett Maher to compete with Hajrullahu.

[62] On February 5, 2024, it was announced that Hajrullahu had signed with the Argonauts, replacing the incumbent, Boris Bede, who was released the same day.

[63] He notably kicked eight field goals in a game against the Montreal Alouettes on September 8, 2024, which tied a league record with three other players.