I have sprained my right and left ankle. But mostly my right ankle, to the point of swelling up to the size of a grapefruit, five times skateboarding. It weakened up a little bit. Sprained it again when I was forty, same thing only difference is that it did not heal for a year and four months. Wish I would have had the doctors Frager has to help me heal. My physical therapy was making it down to Bodega's Alley and drinking and playing pool until I couldn't feel it anymore and then back again on the couch the next day. Those usually took 3 or 4 months to heal. I'm sure he'll be fine.I sprained my ankle as a junior in high school. Made it up and down the court twice. By the time I got to the bench I have an ankle 3 times its normal size. Started practicing after about 2 weeks but it never healed. 50 years later it will dislocate and force me to drop to the ground and pop it back in place. Sooo should he let it heal or try to come back quickly? They’ll figure it out. Just depends on how badly the ligaments are torn.