Veterans already on the free agent market will attempt to get a jump on landing a new job before a smorgasbord of players hits the open market on March 13.
NFL Network Insider Ian Rapoport reported Gillislee worked out with the Detroit Lions on Thursday, per a source informed of the situation.
Gillislee has experience with Lions coach Matt Patricia stemming from their time together in New England in 2017.
At this stage, working out Gillislee is simply the Lions getting a look at potential low-cost depth options. Even a signing wouldn't ensure the 28-year-old would make the squad in August.