I'm not 100% certain, no. But I am certain that I don't ever recall hearing anything about him being dirty.
I love the guy. He really seems to have enjoyed life on and off the field. Yeah, he acts immature at times, but that's part of what I like about him. By everything I've heard/read, he's been super responsible with his money and is also philanthropic through the organization he runs with his father and brother.
Sounds like a great dude to me and I've always been a fan.