As the NFL season heats up, and as a diehard Steelers fan myself, I constantly hear the "winning formula" in football. That is, run the ball, play defense, don't make mistakes. And, with my Steelers approaching a decade of winless playoffs, I decided to see if that tried and true formula actually holds up.
(Linked below if you're interested in the last time the Steelers won a playoff game)
What I Did
I ran a regression using last year's NFL data, and I tested the key metrics that seem to come up in nearly every broadcast. Those are:
Passing Efficiency (net yards per pass attempt)
Rushing Efficiency (yards per rush attempt)
Defensive Yards Per Game
Points Allowed Per Game
Turnover Differential
The Result
Of those key metrics, Three things actually predict winning.
Passing efficiency was the strongest driver in the model. A one unit increase in net yards per attempt was associated with about a 9 percent increase in win percentage. That is a massive effect. Small differences in how efficiently a team throws the ball translate directly into wins over the course of a season.
Turnover differential also had a clear and statistically significant impact. Each additional turnover gained relative to opponents increased win percentage by about 0.8 percent. Over a full season, that adds up quickly. Teams that consistently take care of the ball and force mistakes create a real edge.
Points allowed per game was also significant. Allowing one fewer point per game was associated with about a 2.3 percent increase in win percentage. Defense matters, but more specifically, preventing points matters.
Three of the five variables were statistically significant: passing efficiency, turnover differential, and points allowed. The others showed no meaningful relationship with winning once these were accounted for.
Rushing efficiency had essentially no relationship with winning. Once you control for passing, turnovers, and points allowed, the run game just does not move the needle.
Defensive yards per play also showed no real impact. Giving up yards does not matter nearly as much as giving up points.
Overall, the model explained about 77 percent of the variation in win percentage across teams, which is a strong result for something this simple.
So despite what you hear every Sunday, the formula is not really about balance.
It is about throwing the ball efficiently, winning the turnover battle, and keeping points off the board.
Here's a little line of best fit from the R output (look at that correlation!):
Insights
If you watch enough football, this result does not feel that surprising.
The teams that win usually have the best quarterbacks. They throw the ball efficiently, avoid mistakes, and can create explosive plays when it matters.
What the data does is clarify why that matters. It is not just that good quarterbacks look better or make highlight plays. It is that passing efficiency directly translates into wins in a way that other parts of the game do not.
At the same time, this challenges one of the most common ideas in football. The league constantly talks about balance. Establish the run, stay ahead of the chains, control the game.
But once you actually control for everything else, the run game fades into the background. It is not that running the ball is useless. It is that it does not independently drive winning the way people think it does.
Turnovers tell a similar story. Coaches always emphasize taking care of the ball, but it can sound like a cliché. The data shows it is real. Teams that win the turnover battle consistently win games.
**I really want to note the correlation between QB play and turnover differential as well. Generally speaking, the best QBs are able to be efficient AND take care of the football. We can really see here that a precision passer is as important or more than it's ever been.
And on defense, it is easy to get caught up in yardage totals or advanced metrics. But at the end of the day, the simplest measure still matters most. Preventing points is what shows up in the standings.
Taken together, it paints a pretty clear picture of the modern NFL.
Winning is not about being balanced. It is about being efficient through the air, avoiding mistakes, and keeping points off the board. And perhaps that's why my Steelers and their smash-mouth, hard nosed football seems to be getting fizzled out over time.
