He is a three-time Grey Cup champion, winning with the BC Lions in 2011 and twice more with the Blue Bombers in 2019 and 2021.

After going undrafted in the 2011 NFL draft, Bighill signed as a free agent with the BC Lions of the Canadian Football League (CFL) on May 31, 2011.

Following the season, Bighill's linebacker teammate, Solomon Elimimian, was named the leagues MOP, and both of them signed 3-year contract extensions on the same day.

[9][10] Bighill drew strongly positive attention for his performance during the Saints training camp and preseason.

[24][25] The Blue Bombers signed Bighill to a 3-year $750,000 contract extension in January 2019, making him the highest paid defensive player in the CFL.

"[27] The Bombers were set to defend their title during the 2020 CFL season although it was cancelled because of the ongoing pandemic.

Bighill was scheduled to make $265,000 in the following season, but he took a $145,000 pay cut to stay with the Bombers and help the team in a league that was troubled financially by the pandemic.

[30] Bighill and the Bombers defeated the Saskatchewan Roughriders for the third time that season in the CFL West Division Final, as they would go on to their second Grey Cup game in a row.

Following the season, on January 20, 2022, Bighill and the Blue Bombers agreed to a one-year contract extension.

[32] He had one defensive tackle in the 109th Grey Cup, but the Blue Bombers were defeated by the Toronto Argonauts.

[33] In 2023, Bighill played and started in 17 regular season games where he had 74 defensive tackles, four sacks, and one interception.

He played in his fourth straight Grey Cup game, but the Blue Bombers lost to the Montreal Alouettes.

After Wendy Williams mocked Joaquin Phoenix on her show in 2020 because of his cleft lip, Bighill relentlessly called her out and requested an apology.