Sylvester Williams, DT, Denver Broncos
Williams didn't have a ton of experience coming into the NFL, with just two years of major college football under his belt, and he didn't exactly sprint out of the gate last season. But he picked it up as things went along, starting the final seven games, including all three postseason contests. Williams was lights-out at times. He's very quick and disruptive, and he makes great use of his hands. The competitive defender never stops. I think he'll be a big factor for the Broncos' defense this fall, based on what I saw at the end of last season.
Projection for 2014: 3.5 sacks.
Follow Gil Brandt on Twitter @Gil_Brandt.