The Bengals traded a conditional 2018 pick for Jacksonville DE Chris Smith. I'm not sure about Smith's contract status I haven't looked that up yet, by I can tell you he is a 4th year player out of Arkansas that has 4.5 sacks and 20 tackles in his career. That's not exactly the kind of stats you want to hear. He's also more Wallace Gilberry size than the rest of the guys. He's only 6'1" and 262 lbs.
I'm not real sure about this trade, from the sounds of things the Bengals could have gotten a guy like this in the late rounds and had them on a cheaper rookie contract. Smith was a 5th round pick by Jacksonville. Maybe this is a sign the Bengals are trying to fill some roster spots before the draft in order to package some picks to move up in the draft?