Tag Archives: National Football League

What does Chip Kelly have to do with spotting the ball?

I’m pretty excited that Chip Kelly is coming to the NFL. If you’ve watched the Oregon Ducks in recent years or the Patriots hurry up offense, you’re probably excited too. It’s fun to see teams try something different, and I like seeing fast offenses break defenses’ will using such a simple concept. Sometimes, the defense isn’t even lined up when the ball is snapped. Teams spend tons of energy trying to outsmart defenses, but a fast offense can make it easy.

If the speed game catches on, it has other possible implications. For example, the NFL could shorten the play clock to encourage game pace. Most people would enjoy more football and less standing around. Whether the play clock changes or not, teams will want smaller, faster players on offense and defense, reversing the rapid growth in player BMI over the last thirty years. A size reduction might help with concussions — though force equals mass times acceleration, and acceleration might go up — and it could also help with heart, heat, and other obesity-related illnesses/deaths that lineman face.

So what does this have to do with first downs? Bear with me. The NFL has a credibility problem with it’s measurement technology. I chuckle every time the chain gang trundles out and the ball is measured one link short. Football certainly is a game of inches: in the case of spotting the ball Continue reading

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Some questions and some predictions

Predictions

If you read my post last week, you know that the AFC is a two-horse race and the NFC is a mess. All four first-round games agreed with the True Wins predictions. I didn’t trust the Seahawks on the road, but True Wins came through (11 for the Seahawks versus just 9.5 for the Skins). So, what are we left with? Two clear favorites in the AFC (Patriots and Broncos) and two toss ups in the NFC. True Wins alone takes 49ers over Packers (11.5 to 11) and Seahawks over Falcons (11 to 10.5). I’m going to stick with the home teams in both cases, but don’t expect blowouts in the NFC unless the turnover margin is really skewed.

Questions

As part of football month on the blog, here are a couple random questions and answers that I’ve accumulated.

Should the NFL eliminate kickoffs? Greg Schiano, the Buccaneers crazy coach, thinks the NFL should get rid of kickoffs to protect player safety. A Rutgers player was paralyzed running kick coverage while Schiano coached there, so he knows exactly how dangerous kickoffs can be. Never mind that this is the same coach who runs a “kneel down blitz” when the other team is trying to kill the clock, a tactic that might work once when the other team is not expecting it, but will probably never work again.

Continue reading

Playoff Appetizer: True Wins Plus (Fumble Adjusted)

We might be halfway through the first quarter of the first NFL playoff game of 2013, but I’m still finishing up with baseball and just getting warmed up on football. Football month on the blog officially kicks off today — there’s lots of interest stuff to come, from innovative rule ideas and play calling to new prediction methods and game analysis. Today, I’m trying an addition to the measure of NFL team quality that I debuted last year: True Wins. True Wins are calculated as follows:

True Win = Blowout Wins + Close Wins/2 + Close Losses/2 + Ties/2

You may recognize the intuition from pythagorean expectations — you get full credit for blowout wins (I define this as more than 7 points), but no extra credit for winning by huge margins, and you get half credit for all close games, since those probably come down to luck more than skill. Last year, I showed that True Wins predicts a little better than pythagoreans, and it’s a whole lot more direct. Both measures are much better than using wins alone, which unfairly penalize (reward) teams that lose (win) a lot of close games.

What Else is Luck-Driven? Fumble Recoveries?

With the playoffs coming right up, I decided to try an improvement that adjusts for possible luck in fumble recoveries as well. Here’s the logic (from Football Outsiders):

Stripping the ball is a skill. Holding onto the ball is a skill. Pouncing on the ball as it is bouncing all over the place is not a skill. There is no correlation whatsoever between the percentage of fumbles recovered by a team in one year and the percentage they recover in the next year. The odds of recovery are based solely on the type of play involved, not the teams or any of their players . . . Fumble recovery is a major reason why the general public overestimates or underestimates certain teams. Fumbles are huge, turning-point plays that dramatically impact wins and losses in the past, while fumble recovery percentage says absolutely nothing about a team’s chances of winning games in the future. With this in mind, Football Outsiders stats treat all fumbles as equal, penalizing them based on the likelihood of each type of fumble (run, pass, sack, etc.) being recovered by the defense.

The keys are:

  1. Fumbles are huge turning points in games
  2. Teams don’t maintain high or low recovery rates over time

To quantify #1, I determined the point value of a recovery. A simple regression of point differential in each game on total fumbles and fumbles Continue reading

Is Joe Flacco Elite? Barnwell strikes again!

Bill Barnwell is up to his usual tricks at Grantland. This time, he’s tired of hearing that Flacco is an elite quarterback and wants a new measure of quarterback value. Flacco gets credit for piling up wins, which Barnwell thinks is unfair:

For whatever good or bad Flacco provides, he has spent his entire career as the starting quarterback of the Baltimore Ravens, who perennially possess one of the league’s best defenses. He also has Ray Rice and a solid running game to go alongside him on offense. It’s safe to say that a win by, say, Cam Newton usually requires more work from the quarterback than one by Flacco.

I agree with this wholeheartedly. In response, Barnwell tries to capture quarterback value by creating an “expected wins” measure based on points allowed by the defense and comparing this to actual wins. He argues that a quarterback with more actual wins than expected wins is doing well because he is scoring more points than average.

An example helps explain the concept. First, Barnwell notes that teams have won 86.5% of games recently when allowing between 8 and 12 points. Imagine a team that allows between 8 and 12 points in all 16 games. They are expected to win 86.5% of those games, or 13.8 games. If the team won 14-16 games, Barnwell would argue that the quarterback is doing better than average, while if the team won fewer, Barnwell would argue that the quarterback is doing worse.

As hoped, Flacco is unimpressive by this measure (while the usual suspects — Tom Brady and Peyton Manning — are top dogs). He has 44 wins in 64 regular season games, but because the Ravens D is so good, an average QB would have managed about 42.

Before going farther, I’ll warn you: these numbers are pretty meaningless. I’ll start by explaining Continue reading

Adrian the Canadian explains what happened on the infamous Hail Mary

I’ll let my legal expert, Adrian the Canadian take it away (and believe it or not, this has little to do with the incompetence of the replacement referees and everything to do with the NFL’s replay review procedures):

Every football fan, even the replacement refs, was relieved when the NFL and the real officials resolved their labor dispute. The fast resolution was driven, in large part, by the result of the Monday Night game between the Seahawks and the Packers. By now, even non-fans know what happened. If you’ve been living in a shoe box, here’s the video of the call that encompasses the replacements’ legacy. But simply blaming the replacement refs doesn’t quite get us to the clearly incorrect result. Yes, the refs blew it on the field, but they also had a chance to review the play using instant replay and still allowed the call on the field to stand. How could instant replay fail to correct such an obvious mistake?

The Play:

Down by five, the Seahawks had one chance to beat the Packers: a Russell Wilson Hail Mary pass. While the pass was in the air, Seahawks receiver Golden Tate first pushed off and over a Green Bay defender Continue reading

All 22!

Here it comes – out of nowhere, the NFL decided to release the “all 22” video for every game. Clearly, the NFL read my petition a few months ago and decided it was time for action. As evidenced in the linked article, many insiders are deathly afraid that people will analyze the all 22 tape incorrectly, since accurate analysis requires knowledge of the play call (or a good guess) as well as keen observation and football acumen. The obvious response to this is, “In what sport do observers correctly analyze the proceedings?” There will always be errors in layman analysis. Meanwhile, releasing the all 22 will allow serious fans to actually see the entire game, which has tremendous value of its own.

LOS LIIIIIINNNNNNKKKKSSSSSS!!!!!!!!!!!!!!

This week’s LOS LIIIINNNKKKKSSSS!!!!!!!!!!!!:

As always, send me los links if you have something funny, sports-related, intelligent, and/or intriguing.