... so why bump him over to offense? If the Bengals are that desperate for offensive line depth, why didn't they just comb the waiver-wire for REAL guards?

I've heard of wide receivers being converted to corners, or vice versa. I've heard of defensive ends converted to defensive tackles. But, taking a guy buried on the defensive depth chart and burying him on the offensive depth chart is unusual. Especially when the guy had been dubbed a project at his natural position.

Watch out Bobbie Williams and Nate Livings. Jason Shirley is going to prove he belongs a position he's never played and bump you to the curb.