I am on board with some of these players denying teams individual workouts, especially at this point in the game. Brandon Thomas is a great example why, at this point, injury can cost you millions. There was talk that Thomas could climb into the bottom of the first but should be a solid second, until he blew out his knee in a workout. He is expected to miss most or maybe ALL of the 2014 season. That could easily cost him millions.
The smarter move would have been to have his agent tell the team he was not working out because it was too close to the draft and they wanted to avoid a potential injury. Hell, even if the reason was he was lazy, be smart and use the excuse.