I just re-watched all of the snaps that Cooper played in 3 starts with Cleveland last season.
I had already watched him after they signed him for the playoffs, but I just wanted to review him again.
He was even better than I remembered. He was good.
If he had been starting there for 3 years I would say he looked like an average NFL starter; however, considering that he was new to that team and scheme and probably not in the best condition after being out injured from training camp until late in the season, I think it was quite impressive that he was that good.
He still has decent quickness. He can get moving really fast; although his running looks a little weird with kind of a herky-jerky motion. He appears to have gained a good bit of weight. He has decent power and his awareness is good in terms of blocking the right defender and help blocking, switching up to handle stunts, etc. He did show some occasional lapses in technique which caused him to get off balance but it was not a big issue.
I doubt if he was in great condition last season after missing training camp and most of the season with an injury. He has the opportunity to be in better condition this season.
With a full training camp with the Cowboys and playing with All-Pros around him, I think he can be really good. This scheme seems like a perfect fit for him.
The Browns starter that he replaced was suspended and when he returned is when they cut Cooper with 1 game remaining in the season. My guess is that his agent asked them to cut him if he was not going to start.
Edit: Don't over analyze the positions they are playing in OTAs. Remember OTAs are without Pads. It's a great time to see if Cooper can handle the mental size of playing Center and shotgun snapping. The top backup Center has been out with an injury so it makes sense to try Cooper there.