For one, it's only David's arms that look bigger. His head, neck, and the rest of his body look the same. Well, I don't know for sure about what Frenchy was talking about. But it really is ridiculous to assume something like that. It's such an isolated part of his body that I can't imagine any drug being able to do that.
So, all you David Wright haters out there ... shut up and maybe realize some players do actually work out and are more dedicated than taking drugs.