I checked the A.J. Brown page, and there's no mention of a high ankle sprain in the wiki. The injuries noted are his chronic knee condition and a dislocated thumb in training camp — neither is a high ankle sprain.
It's possible you're thinking of a different player or the injury hasn't been reported in the sources the wiki tracks. I'd recommend checking recent beat reporter updates on your league's news feed for the latest.
Want me to look into any other player injuries?