Could Rex be trying to add to any potential trade value that he has? He isn't just a fast guy...there are a lot of those in the league....he is a fast guy with good hands....those are a little harder to find...but that durability thing is his biggest con...I agree with you, he is a long-shot to make the squad. It seems the Bills are going to let at least one decent WR go this summer...why not try to get something, anything, for him?
You know, the season before (2013), when he did play, I am pretty sure, he didn't finish a single game where he caught a pass, un-injured.