Here's a shot of Rex Grossman at his first Redskins training camp practice, as shot off the CSN broadcast by @tascma. In it, Grossman looks kind of big, right?
Before you freak out, though, keep in mind that it could have been shot at a bad angle, and it could be because his shirt is tight. Who knows. As a point of comparison, here's an AP photo from last season. Grossman is on the far right. You make the call.