Second-round pick Dexter Jackson was held out of the majority of this afternoon's practice after participating in the morning walkthrough, though coach Jon Gruden wasn't specific about what was ailing the receiver/return.

However, we can tell you that we've learned that Jackson tweaked his hamstring early in Friday's practice, which might account for his missing today's workout.

Whatever the issue, it certainly isn't the kind of first impression Jackson was hoping to make in Tampa Bay.

Elsewhere this afternoon, we learned a little more about fourth-round pick Dre Moore. He has been working exclusively at under tackle and defenisve coordinator Monte Kiffin told me he has a real chance to work his way into the regular rotation. They like his ability to bullrush, which Moore says he combines with his noticeable quickness once he wears down his opponents. I'll have more on Moore in a story that runs in Monday's paper.

Also today, we heard from former TCU defensive lineman Tommy Blake, who has battled well-documented issues with depression and social anxiety disorder and now is seen as a long shot. But his mere presence here tells you a lot about him, Gruden said. See Sunday's paper for more on Blake.