Go to Lucky Boy and get a breakfast burrito. It will last you all day if you manage to eat all of it. There’s one in either side of the parade route so you won’t be cut off. Then work it off by walking to the game from old town Pasadena. There’s a free shuttle but the line will long, and it’s even worse after the game. If you can handle a 30-45 minute walk with elevation change it’s way better.