Collapse on him on the drive, and definitely double him when he gets inside, but make sure we have someone sticking to Middleton at all times.
Snell and Brogdon are good shooters, but aren't nearly as dangerous as Middleton. Other than those guys, their threats from the perimeter aren't too scary.
Also try and switch him onto Al and Monroe through the PnR, and go after him. Beating him up in the post should tire him out