Preheat the oven to 350 degrees F.
Hollow out the football pumpernickel bread, creating a bread bowl. If you don't have a football shaped pumpernickel loaf, just use a regular loaf of unsliced pumpernickel bread, or you can serve this in a small baking dish.
Tear the pieces of the inside of the loaf in chunks and save for serving.
In a large bowl, combine the cream cheese, sour cream, Thousand island dressing, mayonnaise, corned beef, sauerkraut, and 1 ½ cups of Swiss cheese.
Spoon the dip into the bread bowl.
Cover with aluminum foil.
Bake in preheated oven for 15-20 minutes, until warmed through.
Serve with additional bread chunks and and crackers, and enjoy!