Arbuckle led the Stamps to an improbable come-from-behind victory in Week 3 of the 2019 season after Bo Levi Mitchell left with a shoulder injury.

[9] The Stamps won four of their seven matches with Arbuckle under centre, before Mitchell returned to the starting lineup for the Labour Day game.

[14] He made his first start with the Argonauts in week 3 of the 2021 season where he completed 23 passes out of 32 attempts for 310 yards and one touchdown in a win against the Winnipeg Blue Bombers on August 21, 2021.

[17] In early January 2022 the Elks and Arbuckle modified the terms of his contract, with a reported salary of $328,000, a housing allowance of $12,000, and a signing bonus of $100,000.

[21] Arbuckle had been acquired by Ottawa in order to compete with Caleb Evans for the starting role while veteran Jeremiah Masoli recovered from a leg injury.

[24] Arbuckle continued as the Redblacks starting quarterback for most of the remainder of the season, however the team saw little success and finished last place in the league with only four wins and 14 losses.

[28] After remaining unsigned for months when he became a free agent, Arbuckle contemplated retirement and beginning a coaching career.

[32][33] In week 7 against the Hamilton Tiger-Cats, down 27–10, he replaced Dukes midway through the fourth quarter where he completed eight of 14 pass attempts for 118 yards with one touchdown and one interception in the 27–24 loss.

[36] He struggled to move the ball, as he completed 12 of 22 passes for 87 yards, but the Argonauts had an interception return touchdown that made the difference in the 16–14 overtime victory against the Blue Bombers.

[35][36] With Dukes nursing a leg injury in week 10, Arbuckle was named the starter for the team's ninth game of the season against the Calgary Stampeders.

[38][39] He completed five of eight pass attempts for 70 yards and led a game-clinching drive at the end of the game to lead the Argonauts to a 30–28 victory.