Originally Posted by RF20Lennon
For the billionth time, he has a lifetime contract with Nike and Wilson. He cannot switch.
Actually he can switch--he may be in breach of contract if he does so (and thus may be liable for damages) but I suspect it would be impossible for either company to force him to use their products. It's a contract, not an indenture. That said, I think it would be highly unlikely for him to do so.