I'm thinking positive that it will fit, my oven is 15 inches high and the breast is 13 inches, I will have to put the pan on the floor of the oven, no rack, I am mostly worried about how wide it is, the thighs are 16 inches around, the "knees" are as big as my wrist. When my husband gets home we will do a test run, if its too big, I'll cut it in half and cook the hen instead for Thanksgiving. I cant life the darn thing, had to get a neighbor to take him out of the car.
I kept one BB white until his legs started going bad. He dressed out at 55lbs. Every muscle group was over developed like he was a body builder. Anyhow, I had to saw the bird in half in order to get it in the oven.