It’s not just his arm that has me convinced he’s either on something illegal or on something that hasn’t been defined as illegal yet, it’s his appearance. When channels like Fox do the year by year face change of Brady, he looks younger as he gets older. That doesn’t not just happen with QB’s, it doesn’t happen with human beings.
I’m convinced he’s on the forefront of some cutting edge product that’s allowing his body to regenerate in some kind of way. It’s the only explanation I can come up with.