We've already seen the impact of one player dying on the field recently, but he was revived. Olave with his concussion issues is a disaster waiting to happen. He's got the concussions from being hit and from hitting the ground so he needs to stop getting hit, but that's hard to do in tackle football. I like that he said he was going to work on strengthening his neck, that should help with some of the whiplash when he smacks his head on the ground. I think he should put on about 10-15lbs of muscle as well. Even if he loses a step, he'd be more durable and since he's a precise route runner and tactician he'd be lethal at 205lbs.
He could go on and never have another concussion again, but I wouldn't take that bet.