Jamaal Charles was among the first wave of the new-style running backs. As much a threat as a runner as a receiver, Charles complicated life for opposing defensive coordinators. Unfortunately, knee injuries limited him to just one game in 2011, five games in 2015 and three games last season.

In February, the Chiefs released Charles after nine years in Kansas City.

The Broncos are hoping Charles still has something left in the tank. The team plans to meet with the running back on Tuesday, according to ESPN's Adam Schefter, and if everything checks out, Charles could have a new home.

When healthy, Charles was one of the top offensive players in the league. In 2013, he rushed for 1,287 yards (5.0 YPC) and caught 70 passes for another 693 yards. All told, he 19 touchdowns.   

Whether Charles will ever return to his previous form is another matter, and one the Broncos will have to consider, assuming he is cleared medically. Denver is looking to add more big-play threats out of the backield. C.J. Anderson is atop the depth chart but he's coming off a knee injury, and behind him is second-year player Devontae Booker. The team also used a sixth-round pick on Coastal Carolina running back De'Angelo Henderson.