Should push him up to Potomac and let him play 1st base and DH. Challenge him, get him some AB's against better competition while lessening the wear on his body by giving him a rest from catching. I know he needs work fielding his position, but he's not going to work on it the past couple weeks of the season. Get him the best experience you can with the bat, and wait until instructional league to get back to the defensive work. He may end up at 1B anyway, so some familirity right now wouldn't hurt him either.