I have bought 10's of both player issued and used Yankees game jerseys
from Steiner and each and every single one came with a LETTER stating
which player the jersey was issued to or used by. I have seen instances
where the letter states just the number on the jersey's back and does
not attribute it to any player.

Although the COA looks legit, I can say with certainty Steiner would not
let an Arod jersey slip out as an un-named "issued' jersey. I've
never handled an Arod Yankees jersey but the ones I've seen or been
offered they were all size 48 with some sort of customizations.

Here's one that just finished on Grey Flannel.

http://catalog.greyflannelauctions.c...atches-%26-Hou

I think you can draw your conclusion from this information.