Russell famously went from MVP of the Sugar Bowl and first overall pick of the Oakland Raiders in 2007 to out of the NFL in 2010. This, of course, after he signed a six-year contract with the Raiders worth up to $68 million, with $31.5 million guaranteed.
While many observers scoff at the notion of a comeback for JaMarcus, the former LSU star is determined to make NFL general managers and talent evaluators give him one last look.
That process starts with his workout for the Bears.
You can follow Russell's entire comeback here on Bleacher Report in the following slides.