according to the tickets.com site:
How can I receive my tickets?
For all delivery methods, you will receive your tickets at least 48 hours prior to the event. At Tickets.com our goal is for you to obtain your tickets quickly and securely. We recommend Premium Shipping for virtually all circumstances. You can also select standard U.S. Mail, Tickets@Home, Will Call to pick up your tickets at the venue or Outlet-Will Call to pick up your tickets at select Tickets.com retail outlet partners.
so yes, you can pick them up at the arena