Shortill was drafted by the Montreal Alouettes with the 13th pick in the 2015 CFL Draft and played for the Alouettes in 35 games over two years. He was traded to the Hamilton Tiger-Cats where he spent three years with the team. Upon entering free agency, on February 11, 2020, Shortill signed with the Toronto Argonauts.[2] He did not play in 2020 due to the cancellation of the 2020 CFL season. He was placed on the suspended list on July 10, 2021.[3] He did not play in any games for the Argonauts and his contract expired on February 8, 2022.[4]