Since the drafting of Tyrone Crawford (well, before that, even), I've seen a lot of people advocating the release of Kenyon Coleman. While I understand that people are not fans of Coleman's pass rushing (which I completely agree with), why would anyone take Marcus Spears over Coleman? Coleman is much better than Spears. Take a look at PFF's 2011 Run Stop Percentage for 3-4 Defensive Ends:

As you can see, while both are touted as run defenders, Coleman is far better than Spears. In fact, Coleman is surprisingly one of the best 3-4 defensive ends in run stop percentage overall. Both are bad at pass rushing, but Coleman is far superior to Spears in run defense; the role they play altogether. According to spotrac.com, Coleman will cost about $2.2 million against the cap this year. However, Spears will cost $2.7 million this year, $2.7 million next year, $3.7 million the year after, and $4.7 million in his final year. Spears has done absolutely nothing to deserve this kind of pay. He has consistently been bad. Really, is if you want to actively advocate releasing any defensive end, then target Spears. Coleman is actually very good at his role. Spears has been average at best and is costing much more than Coleman.