Goldy rather famously hasn't cared what his number is, and only started wearing #46 when he came to St. Louis. I suppose it's possible Pettitte offered it up, or Judge arranged something, but I imagine it's just a holdover.
Either way, I say with 100% confidence Goldy would never ask for it. Guy is as humble as they come.
(Still love you, Goldy. Sorry they made you shave. *sob*)