According to this, Dawkins organized a workout with any players who were available with conditioning trainers. This was not mandatory seeing as most players are on vacation still. Notables who did show up were Walton, Mays, Ayers, Orton, Vickerson, and Beadles. Tebow was not there but that might be because Tebow is still in Gainesville for his Golf tourney. It should also be noted that a DP commenter said that Orton has been working out all offseason with teammates including starting center Walton. I don't know how accurate that is though since it was just a comment.