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Defensive tackle is easily the Broncos' weakest position and both starters from 2012, Kevin Vickerson and Justin Bannan, will be free agents this offseason. Mitch Unrein had a productive year but he is a free agent as well. That leaves Sealver Siliga as the only defensive tackle signed for the upcoming season.
Even if the Broncos re-sign all of those guys, it is still a position in need. There is a wealth of talent at the position in this draft and several of them could be day-one starters for the Broncos.
(All projections are according to NFLDraftscout.com)
Star Lotulelei, Utah: Lotulelei will be one of the first five picks in this draft, so unless the Broncos trade up from the No. 28 spot, there's no way they'll get him. His stock has risen all year and he will make a great interior lineman no matter which team drafts him. Extremely powerful, Lotulelei is also a huge mismatch for many guards and centers and has drawn comparisons to Ndamukong Suh.
Shelton Richardson, Missouri: Due to the way he plays the game, Richardson reminds many of J.J. Watt. He is a disruptive tackle who can also play defensive end. A very versatile athlete, he will likely be gone by the time the Broncos go on the clock, but if he happens to be there, the team should not hesitate to take him.
Jesse Williams, Alabama: Williams is a big man (6'4", 320), yet very athletic. If the Broncos selected him, he would be used mainly to plug the gap in the middle and shut down the run. He's more suited for a 3-4 scheme and is not viewed as much of a pass-rusher.
John Jenkins, Georgia: A lot like Williams, Jenkins is a 350-pound run-stopper who is a very good athlete. He wouldn't bring much to the pass rush of the Broncos, but you will see several mock drafts over the next couple of months that have Jenkins coming to Denver.
Johnathan Hankins, Ohio State: Hankins may be the best run-defender in this year's draft. He gets off the block very well and is very physical at the point of attack. He may be just a two-down tackle, however.
Shariff Floyd, Florida: Floyd is a very intriguing prospect and one who has plenty of raw talent. He is not the most refined defensive tackle in this draft but he is very coachable and is a guy who could turn into a very productive player. Some may see Floyd as a reach in the first round, but if he gets into the right scheme, he will pay huge dividends down the line.
Kawann Short, Purdue (pictured): Short would be an excellent choice for the Broncos, even in the first round. Both quick and strong, Short defends the run well but he would also bring a boost to the pass rush as teams would have to account for Miller and Dumervil, allowing the explosive Short to come up the gut. Short is the type of player who could have 6-7 quarterback sacks a season and may be the best fit at the defensive tackle position for the Broncos.
Sylvester Williams, North Carolina: Williams isn't the quickest player at the position, but he uses his hands very well, whether it be to fight off a lineman or to bat down a pass. Williams would need to improve his tackling, but he could definitely start over a guy like Bannan.