Denver traded Bell to the Detroit Lions in March 2007, along with tackle George Foster, for cornerback Dre' Bly. Bell was a 1,000-yard rusher for the Broncos in 2006 and was a second-round pick of Denver's out of Oklahoma State in 2004.
The speedster was cut by the Lions this summer. He is infamously remembered for being accused of taking fellow running back Rudi Johnson's luggage from the facility after he was cut and Johnson was signed by the Lions. Johnson accused Bell of taking his belongings. Bell said it was an honest mistake.
Bell has been out of work since being cut by the Lions and he was living and working in Denver for the past two months. The Broncos called Bell for a workout Tuesday after they suffered a series of injuries at tailback.
"I'm humbled," Bell said. "I didn't think I was going to get another chance, to be honest. I thanked coach [Mike] Shanahan for giving me this chance. I'll do whatever it takes. I'll play special teams. I'll play center. I'll do whatever it takes to help the Denver Broncos win."
The Broncos lost running backs Michael Pittman, Andre Hall and Ryan Torain for the season in their past two games. Denver was down to injured Selvin Young and rookie fullback Peyton Hillis at tailback.
Bell is expected to suit up for the Broncos on Sunday at Atlanta.
Bill Williamson covers the AFC West for ESPN.com.