Hmm... Super Bowl is Sunday evening so why getting it done on Saturday? First brisket on an overnight smoke is really stepping out there. The 14# will probably trim out to somewhere around 11#. Weigh the trimmings so you know final smoking weight. Would recommend smoking it at a verified 275º grate temp. You need to verify your grate temp with a known calibrated external thermometer. Do NOT reply on the built in thermometer, they are notorious for being inaccurate. Allow for 14 hours until dinner time. The brisket should become tender and hopefully have rested for at least two hours (maybe more) before slicing. When the IT in the thickest part of the flat reaches 195º start probing all over the flat (not the point). You are looking for a feel like going in/out of peanut butter. If not tender wait for a 3º IT rise and probe again. Repeat until tender. Once there, remove and let sit open on the counter to allow the cooking to stop. The IT should drop approx 5%. Then place in a cooler covered with towels and let it rest until dinner time. With that said, I personally would start smoking around 3-4am Sunday morning.
Good luck and don't forget, no pictures and it didn't happen.