Similar to the thread about Molk the other day, here's the feedback Bob McGinn of the Milwaukee Journal-Sentinel's received about Martin. He has him #8 among DTs.
8. MIKE MARTIN Michigan 6-1½ 305 4.84 2-3 Described by one scout as "a modern-day version of Kelly Gregg." Shortest DT on the board but also one of the most tenacious. "He is one good football player" another scout said. "Strong. Bright guy. Got a lot of pizzazz to him." Won a state wrestling champion at Detroit Catholic Central High. "As good looking as he is and as athletic as he tests he just doesn't play with a lot of juice on a consistent basis or with a lot of power," a third scout said. "Not much of a pass rusher. He could probably be a two-down starter in a 4-3, not a 3-4." Finished with 172 tackles (25 for loss) and 10 sacks in 49 games (37 starts). "He will face 350-pound guys that are just going to fall on top of him," a fourth scout said. "You love his intensity. He's swelled up. He's run out of skin, that guy."
Reading the other evaluations, the scouts don't have the questions about desire or love of football that they lay on a lot of other players. I do wonder if the comments about a the lack of "juice" and "power" came from viewing games when Martin was hurt.