timmyjoe42 Wrote:
I didn't realize that you could win in the NFL by bluffing.
Understanding percentages, actually.
From Joe Posnanski
"The best explanation I’ve read of the decision so far this morning comes from Brian Burke in the New York Times fifth down blog. Burke was a Navy pilot, and now he writes the Advanced NFL Stats blog.
His explanation is simply this: A team picks up fourth and two about 60 percent of the time — and we all know that a fourth down conversion in this case means certain victory. On the flip side: A team would score a game-winning touchdown from the 30 about 53 percent of the time. This leads to this formula — the first part is the 60% multiplied by 1 (1 signifying the certain victory if the play is converted). The second part is 40 percent multiplied by the chance of winning the game if the 4th down play fails:
(.60 *1) + (.40*(1-.53)) = 78.8% chance of winning.
There you go. Burke then estimates the chance of winning if Belichick punts — that is the chance of a team going 66 yards for a touchdown in the final two minutes. He says, historically, teams get that about 30% of the time. So a punt gives the Patriots a 70% chance of winning.
And there you go — 78.8% chance of winning vs. a 70% chance if you punt. It really is clear cut. I don’t know if Belichick plays with such percentages in his mind, but instinctively he knew that his team’s best chance to win was to go for it.
Now, you probably are saying here that the numbers do not sound all that authentic. The Peyton Manning Colts would have a much better than 53% chance of scoring from the 30 (and, as it played out, the Colts scored so easily and left so little time on the clock it seemed just about automatic). But, you have to figure that the Colts also had a much better than 30% chance of scoring had the Patriots punted — no doubt this was weighing on Belichick’s mind. And for that matter, you have to figure that Tom Brady has a better chance than 60% chance of converting on fourth down and two.
Really, no matter how you play with the numbers, it will come out about the same. Try it. There is almost no way — without suppressing the numbers — to make the percentages even out. The Patriots best PERCENTAGE chance was to go for it on fourth down."