Bucs sign ANOTHER receiver

Arena League Rookie of the Year Ben Nelson now a Buc.

I've had some time to digest this move and I'm still not sure what Gruden is up to. Is this yet another sign of Gruden's fascination with adding receivers to the roster? Or another attempt by Gruden to motivate Clayton to reach his potential? Or some mixture of both?

Either way this move can only work out well for the Bucs. If Nelson somehow beats out the five receivers above him on the depth chart then the Bucs end up with more talent on the roster than before. If Nelson can't cut it then the Bucs cut him, and end up spending (basically) no money.