Martin was a noted gym rat and was in terrific playing shape coming in. (sidenote: did Martin enroll early? I can't remember.)
Will apparently came in around 335 thanks to inactivity and poor dieting. Having enrolled early may give him enough time to get in playing shape though. We'll see.
I'd expect he probably sees some time in the rotation later in the year. Ideally he would redshirt, but d-line depth == scary.