Juwan Thompson has moved to the front of the undrafted rookie running back pool. That still leaves him as the Broncos' No. 4 running back — behind Montee Ball, Ronnie Hillman and C.J. Anderson. But it's better than being fifth or sixth on the depth chart, which is where Thompson was through the offseason and the early part of camp. "They've been working everybody in slowly," he said. "Nothing's guaranteed right now." Thompson might be stronger in the passing game than most tailbacks, having come from Duke and coach David Cutcliffe, Peyton Manning's favorite quarterback mentor among non-Broncos. That background might help give Thompson an edge against undrafted rookies Brennan Clay and Kapri Bibbs. "I grew up in the passing game, and it's the same thing here with Peyton," Thompson said. "That means you have to think about protection first, and routes. The run game, it's fairly easy to get the ball and run. But when you've got to run a route, beat a defender, and also catch the ball and get upfield, it's a little more difficult." Thompson met Manning when the star QB had his annual two-day Broncos receiver camp at Duke in March. That helped Thompson stay grounded as he walked into his first NFL locker room as a player in late May.