Aaron Schatz over at ESPN put together a top 25 list of potential breakout players for this next season (LINK, $). Here's what he had to say about Martin, who came in at #17:
Martin, a third-round pick in the 2012 draft, led all Titans defensive tackles last year with 8.5 hurries. That's surprising considering he's more of a classic nose tackle rather than a penetrating three-technique. Scouts considered Martin a blue-collar grinder whose best strength was his solid base. But in his first year in Tennessee, he was faster than advertised and showed a variety of pass-rush moves. Martin was considered a possible first-round pick until he really struggled during his senior year at Michigan. That was partly due to a scheme change, although oddly, the new scheme he struggled in was actually more similar to what he's playing now in Tennessee. He should be in line for a jump in playing time despite the signing of Sammie Lee Hill.
A couple other notable players are Ronnell Lewis of the Lions (#23), and Ryan Mallett (#8).