RENTON, Wash. -- Thoughts and observations after watching the Seattle Seahawks open their rookie camp Friday:

First-round pick Bruce Irvin impressed coaches with his ability to grasp defensive concepts. That can be a concern for any rookie and particularly for one with Irvin's unusual background (out of football for two years while living on the streets). Irvin practiced with intensity. He did not get great results immediately and it was easy to see why. Alex Barron, who has practiced against Leonard Little and DeMarcus Ware over the years, was one of the few veterans in camp. While Barron's career has faltered, he remains a first-round talent and it showed in the first practice. The Seahawks are giving him a tryout. Barron, a first-round pick for St. Louis in 2005, is 29 years old and spent last season on injured reserve with New Orleans. He looked healthy and was obviously more talented than the free-agent offensive linemen in camp.

Coach Pete Carroll raved about running back Robert Turbin. He loved Turbin's quickness and feel for the zone running game. Turbin has huge biceps, but his lower body looks like it belongs to a smaller man.

Third-round quarterback Russell Wilson took twice as many snaps as any rookie and made a resoundingly positive first impression. Wilson threaded perfect passes all over the field, hitting receivers and tight ends in stride. Height, not talent, is the concern for the 5-foot-11 Wilson. He did have three passes tipped near the line of scrimmage, by my count. A couple deep balls failed to find their targets, Carroll noted. Wilson is going to get the attention of the veteran quarterbacks, it looks like.

Fourth-round pick Jaye Howard, a defensive tackle from Florida, impressed Carroll with his quickness.

The Seahawks invited draft choices' families to watch practice. All 10 picks had family in attendance on a spectacularly sunny day on the shores of Lake Washington.

Linebacker Korey Toomer, a fifth-round pick from Idaho, appeared athletic. He picked off a batted pass and headed for the end zone with it.