Shedding 50 pounds to get down to a svelte 265, the 27-year-old Russell managed to attract Chicago as an insurance policy against injuries.
Selected by the Oakland Raiders out of LSU first overall in the 2007 draft, Russell threw 18 touchdowns, against 23 interceptions, for 4,083 yards over the course of 31 painful games as a professional.
Once wooing scouts with his size and incredible arm strength, the man resembling Rerun is widely considered the biggest bust in league history.
A laughingstock without a job, Russell deserves ample credit for remaining focused and continuing to train hard.
Unfortunately for the toothless Tiger, it is unlikely that Russell will soon receive another opportunity in the NFL.
If the native Alabaman can impress elsewhere, a team will eventually give JaMarcus Russell another chance.