Really? Let me check -- Yeah they seem to work, but they seem to be a really tight fit.
What I do is I buy as many Quarterback Clubs as I can for the 32X. They are super cheap and have great plastic boxes. I toss the game and keep the box. Here's some examples:
When I don't have a 32X box, a regular EA box will work, but the cart tends to slide around a bit. You can get EA boxes super cheap since they made so many awful sports games.
Speaking of EA boxes, if you get one of the super fat ones, you can use it to house Sonic and Kuckles!
PS - Thanks Pixeljunkie!!!!