I wouldn’t disrespect the man and say he was made of glass. NFL level collisions are at the level of severe car crashes, and safeties who play like Sanders may have a dozen or more in a single game.
Very few humans are able to take that kind of punishment.
Injury prone, yes….weak body made of glass…nah
Bo Jackson is the closest thing to a real life superhero that we have ever seen. I’m 50 and he is by far the greatest athlete I have ever seen, and it’s not even close.