Damn, I can't believe that about Brown. My dad just had a stroke on the 3rd of January. Something I never thought twice about previously seems to be everywhere.
For what it's worth, the number one priority post-stroke is preventing stoke number 2. There is an extremely high rate of recurrence and a high mortality rate as the brain is weakened in the affected area. Most people go on blood thinner/anticoagulant (warfarin, eliquis etc.) for at least 6 months, and possibly for life depending on the situation.
My dad had an underlying heart condition that caused the stroke (atrial fibrillation). That root cause was determinative for his long term treatment plan. He was also a surgeon and had the stroke while operating, so he was treated in record time and only has symptoms of expressive aphasia (think of that feeling where the word is on the tip of your tongue, but with everything). He also has issues with complex tasks like high level math and chess (thinking ahead, planning moves).
I can't imagine playing D1 RB in the near future if Brown did have a stroke. The risk of a second stroke and death coupled with anticoagulant treatment makes a physical contact sport seem like a distant future. Factor in the cognitive issues and possible motor function issues/rehab, and it's a long - yet doable - road to recovery. That sucks for the kid with his entire future ahead of him, but hopefully he pulls through without any long-lasting side effects. Football should be a distant secondary thought for now.