If the listing exists on StubHub and you can transfer the tickets, you're certainly welcome to list them on StubHub. Then, once they sell, you'll log into your Ticketmaster account and transfer them to your buyer and confirm the transfer on the StubHub website.
I am listing mobile Yankees tickets from Ticketmaster. The "transfer" button is currently available on Ticketmaster, but the tickets and barcodes will not be available until a day or two before the event. Will I need to enter the barcode information on StubHub once it becomes available, or will I be able to complete the sale on StubHub via transfer of the tickets? StubHub only had an option to sell "barcode" tickets for this event--not "mobile" tickets.