said by Draiman:Preseason is a often the only time for them to show their stuff. If they can't impress the coaches they sit for the season or get cut. You have to EARN field time in the NFL. That starts with preseason field time.
And it's that way for all NFL players. There's no exemption for Tebow despite what his fans say. Like every other NFL player he deserves only what he earns through his play.