I have no doubt that Buxton’s knee, or knees, bother him sometimes. No doubt at all. Same with Taylor’s back, Correa’s feet and ankles, same with Luis Arraez’s knees, same with pretty much every player out there, are dinged up to some degree.
A few people here are speaking as if they have medically evaluated Buxton themselves. One poster just declared that Buxton’s outfield career is already over.