I don't know what the Diamond is like, but I recently got a Samsonite 36" bag that can fit half of Ohio in it. It has the zippered lower compartment, then is a duffel up top with 3 pouches that go into the main compartment. You can use the pouches or the space in the main compartment -- which works great for dirty clothes, shoes, even hats.
I use the bag for football, and its probably a bit big for that, but the smaller one didn't have the split bottom. Very similar to this, but maybe an older version. I got mine at the Samsonite Outlet, so if you have one near, check that.
Samsonite Casual 36" Wheeled Duffel - eBags.com