Theis went undrafted during the
2025 NFL draft. He attended the
Denver Broncos rookie minicamp, but did not sign. Theis signed with the
Montreal Alouettes on May 19, 2025. He made the team's active roster following training camp and played in his first professional game on June 6, 2025, against the
Toronto Argonauts where he had three carries for 22 yards and one catch for ten yards. He later scored his first touchdown on an 80-yard punt return on August 8, 2025, against the
Edmonton Elks. ==References==