If it's the ankle, then give him some time to heal. If not on the DL, then at least a few days in a row with some rest and treatment. If it isn't the ankle, then get him out there and let him swing through his struggles. Maybe drop down a bunt for a hit or concentrate on blasting it right up the middle instead of trying to turn on everything. That's how most professional hitters bust a slump. Try to cream the pitcher with a line drive.