Acquired: Signed as a free agent on April 3, 2014.
2015: In 14 games, Jefferson recorded 17 defensive tackles, five sacks, two forced fumbles and three knockdowns.
2014: In 17 games (10 starts), Jefferson recorded 19 defensive tackles, four sacks, six pass knockdowns, one fumble recovery and one blocked punt. He recorded his first CFL sack in Week 3 against the Ottawa REDBLACKS. In the Labour Day Classic, Jefferson blocked a Rob Maver punt, recovered by teammate LB Otha Foster who ran it back for a 57-yard touchdown. Jefferson started at defensive end in the West Semi-Final against Saskatchewan and the West Final against Calgary.
Pro: In 2013, Jefferson spent time with the Houston Texans, appearing in six games.
College: Jefferson earned All-Southland Conference first-team honours as a senior at Stephen F. Austin. He recorded 36 tackles, a team-high eight sacks and five forced fumbles in 11 games.