Still very small but went from 1 in 5000 to 1 in 250 — 20 times more likely after last night. I'm running 25,000 simulations, and we go undefeated in about 100 of those. The reality is it's extremely difficult to go undefeated in football, even if you are heavily favored in all your games. A team that has a 85% chance of beating every individual opponent still has an 85% chance of losing at least one game.