If my mind serves me correctly, this is the Whataburger within walking distance of Tempe Diablo. Stadium is in Tempe, but this is in Phoenix. I came here on a Saturday afternoon prior to the game, and while it was busy I got my order in about 5 mins.
Got the Double Cheese combo! It comes with lettuce, tomato, onions, and the whole shebang! Except mayo. The taste was great as it reminded me of a Double Whopper! Too bad, Whataburger is an AZ thing otherwise I would try the other items. And oh yeah, they have Spicy Ketchup here also.