No they use him at LB.. too much actually for a lot of fans here. The local radio guys (105.3 The Fan) have been clamoring for Quinn to move him to DE permanently for some time now. micah didn't play much DE in college, so when he was such a beast rushing the QB the radio guys (and fans) have been wanting him to move there permanently.
What they're not taking into account is that playing DE full time is going to wear him down. The problem with Micah late in the year the last 2 years is that he wears down from playing DE, so it'll be interesting to see how he does now. I don't think gaining weight will change much because he's just not a full time DE. He's just a helluva player that has a gift to rush the passer... just not the body type.