The Wilton Football pan is a 3-d shape, it's only a one cake mix size.
Those Wilton pans haven't been used by me for about a decade. That photo looks like one cake mix baked in one pan which is half a football. Pretty much like the photo. So two cakes would make a whole football, not that I've done it myself. I think that I put the half football on a large sheet cake (It's been ages and I've forgotten) I donated my Wilton Pans to the Sally Ann.
Except for Mickey Mouse, I kept it, Love Disney stuff.
I made a football cake using two, 10 3/4 x 7 5/8 inch Wilton oval cake pans. I do not know if these are available individually anymore, or only as a set. Here is a link to the set:
I posted a complete series of photographs and an explanation on the Wilton forum:
After baking the two oval cakes, I cut them level with the top of the pan, then filled them with oreo buttercream filling, then carved a LITTLE TEENY TINY BIT AT A TIME!!!! until I got the finished shape I wanted. Then I crumbcoated, then finished.
This was actually made for a man who works with the San Diego Chargers. The cake was a surprise at a restaurant where he eats all the time.
Feel free to PM me with any questions.
AThis does look like a full round football. Don't see why you couldn't make that flat pan twice like you said, put them together to make a full football. Flatten the bottom a little. Kind of like the pillow pan.
Thanks so much for the help!! I am going to try that out! :)