Terrelle Pryor joined the Raiders in training camp drills on Friday. Pryor had two fumbled snaps and a few errant passes in his 16 plays during sessions, looking more like someone who hadn't played football since January than a future franchise quarterback. "The problem is that now I'm 17, 18 days, practices behind right now," Pryor said. "I'm just playing catch-up right now. Some of the stuff is getting there, and I'm starting to get familiar with some of the stuff. But it's been one day. Give me a couple of days, and I should be able to fill it in and feel a lot more comfortable." Pryor was taken in the third round of the supplemental draft on Monday and signed a four-year contract Thursday night.