by Chase Stuart
on December 17, 2012
I’ve got sacks on the mind today. A few hours ago, I looked at the single-season sack records by various players in both the 3-4 and 4-3. Today I also want to look at things from the team perspective. In 2012, which team is the best at getting to the quarterback? You might think that’s as simple as looking at a list of defensive statistics and sorting by sacks, but I’d like to take a more nuanced approach.
There are two factors that heavily impact a team’s sack rate: the opponents they face and the number of passing plays they defend. Using sack rate instead of sacks helps to solve the latter issue, but we still need an opponent adjustment even if we use sack rate. It’s a bit tricky doing it correctly, because you need to iterate the results just like you do with the SRS. What I mean by that is the sack rate of the Denver defense will need to be adjusted for the sack rate of the Kansas City, Oakland, and San Diego offenses (among other teams), and those will need to be adjusted for the Denver defense (and all the other defenses those teams faced).
Once you properly iterate the results, what are the results? The table below shows the top defenses this year at getting to the quarterback, although note that these numbers exclude the games from week 15. The table shows how many pass attempts each team has faced, the number of actual sacks they have recorded and their actual sack rate; the next column shows the SOS adjustment to the sack rate, with a positive number indicating a difficult strength of schedule (i.e., they’ve faced teams that are difficult to sack). The last two columns show the SOS-adjusted sack rates and total sacks.
Rk | Team | ATT | ACT SK | SK RT | SOS | ADJ SK RT | ADJ SK |
1 | DEN | 506 | 39 | 7.7% | 0.9% | 8.6% | 43.3 |
2 | CIN | 542 | 43 | 7.9% | 0.5% | 8.4% | 45.7 |
3 | ARI | 426 | 34 | 8% | -0.5% | 7.4% | 31.7 |
4 | DAL | 429 | 29 | 6.8% | 0.3% | 7.1% | 30.4 |
5 | CAR | 483 | 30 | 6.2% | 0.9% | 7.1% | 34.2 |
6 | KAN | 389 | 24 | 6.2% | 0.9% | 7.1% | 27.5 |
7 | STL | 489 | 39 | 8% | -1.2% | 6.8% | 33.1 |
8 | PHI | 467 | 28 | 6% | 0.8% | 6.8% | 31.6 |
9 | HOU | 533 | 37 | 6.9% | -0.2% | 6.7% | 35.9 |
10 | MIA | 532 | 37 | 7% | -0.2% | 6.7% | 35.7 |
11 | GNB | 524 | 35 | 6.7% | -0.1% | 6.6% | 34.6 |
12 | BAL | 506 | 30 | 5.9% | 0.6% | 6.6% | 33.3 |
13 | CLE | 531 | 34 | 6.4% | 0.2% | 6.6% | 34.8 |
14 | NYG | 464 | 31 | 6.7% | -0.1% | 6.5% | 30.4 |
15 | SFO | 478 | 32 | 6.7% | -0.4% | 6.3% | 30.3 |
16 | PIT | 434 | 26 | 6% | 0.3% | 6.3% | 27.4 |
17 | ATL | 463 | 28 | 6% | 0.3% | 6.3% | 29.2 |
18 | BUF | 484 | 31 | 6.4% | -0.2% | 6.2% | 30.2 |
19 | CHI | 498 | 33 | 6.6% | -0.5% | 6.1% | 30.6 |
20 | SDG | 508 | 25 | 4.9% | 1% | 5.9% | 30 |
21 | TEN | 481 | 27 | 5.6% | 0.3% | 5.9% | 28.3 |
22 | SEA | 475 | 32 | 6.7% | -1.1% | 5.7% | 27 |
23 | NWE | 511 | 28 | 5.5% | -0.1% | 5.3% | 27.3 |
24 | NOR | 496 | 25 | 5% | 0.2% | 5.3% | 26.1 |
25 | MIN | 515 | 31 | 6% | -0.8% | 5.2% | 27 |
26 | DET | 490 | 30 | 6.1% | -1.1% | 5% | 24.4 |
27 | WAS | 539 | 23 | 4.3% | 0.7% | 4.9% | 26.6 |
28 | TAM | 541 | 24 | 4.4% | 0.5% | 4.9% | 26.5 |
29 | NYJ | 446 | 22 | 4.9% | -0.1% | 4.8% | 21.5 |
30 | IND | 470 | 24 | 5.1% | -0.4% | 4.7% | 22.3 |
31 | OAK | 465 | 17 | 3.7% | 0.7% | 4.3% | 20.1 |
32 | JAX | 464 | 14 | 3% | 0% | 3% | 14 |
[continue reading…]
Tagged as:
Christian Ponder,
Peyton Manning,
Sacks,
Von Miller
{ }
by Chase Stuart
on December 16, 2012
Manning finds the last empty spot on his trophy case.
What do you give to the man who already has everything? How about a Comeback Player of the Year Award?
Right now, the choice for AP Comeback Player of the Year is a two-horse race between Peyton Manning and Adrian Peterson. If Manning wins the award, it will put him in pretty rare territory: he’d be just the fourth player to, over the course of a career, be named by the Associated Press as the Most Valuable Player of the Year, Comeback Player of the Year, and Super Bowl MVP. Can you name the first three?
Below is one hint for each of the three players who have won all three awards.
Trivia hint for Player 1 |
SelectShow> |
He is still an active player.
|
Click 'Show' for the Answer for Player 1 |
SelectShow> |
Tom Brady was named the Super Bowl MVP after the 2001 and 2003 seasons, the MVP in ’07 and ’10, and the Comeback Player of the Year in 2009.
|
Trivia hint for Player 2 |
SelectShow> |
In between winning a Super Bowl MVP and the MVP award, this player suffered a ruptured disk in his back that was supposed to end his season and perhaps his career; he came back two months later and played well enough to win the AP Comeback Player of the Year award.
|
Click 'Show' for the Answer for Player 2 |
SelectShow> |
Joe Montana was a Super Bowl MVP in ’81, ’84, and ’89, and he was named the game’s Most Valuable Player in 1989. But in the middle of his career, he pulled off one of his greatest tricks, winning Comeback Player of the Year award in the same year he was injured.
|
Trivia hint for Player 3 |
SelectShow> |
This guy is the king of hardware. He has an MVP, a Super Bowl MVP, a Comeback Player of the Year…. and an AP Offensive Player of the Year award, an AP Offensive Rookie of the Year award, and a Heisman Trophy. That’s one full trophy case.
|
Click 'Show' for the Answer for Player 3 |
SelectShow> |
Marcus Allen may not have been the best player of all time but it’s hard to find a more decorated one. He became the first collegiate player to rush for 2,000 yards in a season and won the Heisman Trophy in 1981 at USC. The next year he won the Rookie of the Year award, and two years later he picked up a Super Bowl MVP award. Two years after that he was named the AP’s MVP, and then eight years later — in his first year out of Al Davis’ grasp — he was named the AP Comeback Player of the Year while playing with the Chiefs and leading the NFL in rushing touchdowns.
|
Tagged as:
Awards,
Comeback Player of the Year,
Peyton Manning,
Weekend Trivia
{ }
by Chase Stuart
on August 31, 2012
The original standard for postseason success.
On Wednesday, I explained the
methodology for grading each quarterback in each season. Yesterday, I came up with an
all-time career list of the best quarterbacks based on their regular season play. Today, a look at playoff performances.
Using the same formula, we can grade each quarterback in each game and adjust for era . However, it should be obvious that the sample sizes here are incredibly small, and the stats are even less likely to tell the true story when looking at just one game. Strength of schedule becomes a significant factor here, as well. But, caveats aside, there’s a lot we can do with playoff data. For example, we can rank every quarterback performance in Super Bowl history:
If you type Montana’s name into the search box, you can see that he has the 1st, 4th, 11th and 27th best performance in Super Bowl history. The best performance in a losing effort goes to
Jake Delhomme, who shredded the Patriots secondary in the second half of Super Bowl XXXVIII (he began the game 1 for 9 for 1 yard). The worst performance in a winning effort, unsurprisingly, goes to
Ben Roethlisberger in Super Bowl XL, although
Joe Theismann against the Dolphins gets an honorable mention. Worst performance overall goes to
Kerry Collins, although
Craig Morton’s 4 interceptions and 39 yards on 15 attempts against his former team in Super Bowl XII could give Collins a run for his money.
What about best championship game performances in the pre-Super Bowl era?
[continue reading…]
Tagged as:
GQBOAT,
Joe Montana,
Kurt Warner,
Peyton Manning,
Playoffs,
Tom Brady
{ }
by Chase Stuart
on August 30, 2012
Yesterday, I explained the methodology behind the formula involved in ranking every quarterback season in football history. Today, I’m going to present the career results. Converting season value to career value isn’t as simple as it might seem. Generally, we don’t want a player who was very good for 12 years to rank ahead of a quarterback who was elite for ten. Additionally, we don’t want to give significant penalties to players who struggled as rookies or hung around too long; we’re mostly concerned with the peak value of the player.
What I’ve historically done — and done here — is to give each quarterback 100% of his value or score from his best season, 95% of his score in his second best season, 90% of his score in his third best season, and so on. This rewards quarterbacks who played really well for a long time and doesn’t kill players with really poor rookie years or seasons late in their career. It also helps to prevent the quarterbacks who were compilers from dominating the top of the list. The table below shows the top 150 regular season QBs in NFL history using that formula, along with the first and last years of their careers, their number of career attempts (including sacks and rushing touchdowns), and their career records and winning percentages (each since 1950). For visibility reasons, I’ve shown the top 30 quarterbacks below, but you can change that number in the filter or click on the right arrow to see the remaining quarterbacks.
[continue reading…]
Tagged as:
Brett Favre,
Dan Marino,
GQBOAT,
John Elway,
Johnny Unitas,
Peyton Manning,
quarterbacks,
Tom Brady
{ }
by Chase Stuart
on August 29, 2012
In 2006, I took a stab at ranking every quarterback in NFL history. Two years later, I acquired more data and made enough improvements to merit publishing an updated and more accurate list of the best quarterbacks the league has ever seen. In 2009, I tweaked the formula again, and published a set of career rankings, along with a set of strength of schedule, era and weather adjustments, and finally career rankings which include those adjustments and playoff performances.
If nothing else, that was three years ago, so the series was due for an update. I’ve also acquired more data, enabling me to tweak the formula to better reflect player performance. But let’s start today with an explanation of the methodology I’m using. To rank a group of players, you need to decide which metric you’re ordering the list by. I’ll get to all of the criteria I’m not using in a little bit, but the formula does use each of the following: pass attempts, passing touchdowns, passing yards, interceptions, sacks, sack yards lost, fumbles, fumbles recovered, rush attempts, rushing yards and rushing touchdowns. Most importantly, the formula is adjusted for era and league.
Two of the best quarterbacks ever.
So where do we begin? We start with plain old yards per attempt. I then incorporate sack data by removing sack yards from the numerator and adding sacks to the denominator . To include touchdowns and pass attempts, I gave a quarterback
20 yards for each passing touchdown and subtracted 45 yards for each interception. This calculation — (Pass Yards + 20 * PTD – 45 * INT – Sack Yards Lost) / (Sacks + Pass Attempts) forms the basis for Adjusted Net Yards per Attempt, one of the key metrics I use to evaluate quarterbacks.
For purposes of this study, I did some further tweaking. I’m including rushing touchdowns, because our goal is to measure quarterbacks as players. There’s no reason to separate rushing and passing touchdowns from a value standpoint, so all passing and rushing touchdowns are worth 20 yards and are calculated in the numerator of Adjusted Net Yards per Attempt. To be consistent, I also include rushing touchdowns in the denominator of the equation. This won’t change anything for most quarterbacks, but feels right to me. A touchdown is a touchdown.
[continue reading…]
Tagged as:
Aaron Rodgers,
Dan Marino,
Eli Manning,
GQBOAT,
Joe Montana,
Johnny Unitas,
Peyton Manning,
quarterbacks,
Steve Young,
Tom Brady
{ }
by Chase Stuart
on July 20, 2012
Let’s start with some trivia before moving to today’s post:
- Only two quarterback-receiver pairs have ever topped the 10,000 yard mark. Can you name them?
Hint: |
SelectShow> |
The same quarterback was part of both pairs.
|
- Only two receivers (minimum: 7,000 yards) gained at least 93% of their career receiving yards from one quarterback. Do you know who they are?
Hint: |
SelectShow> |
The same quarterback was part of both pairs, but this is a different quarterback than from question 1.
|
- Two of the men in the top ten in career receiving yards can credit the same quarterback account for more of their yards than any other passer. Can you name that quarterback?
Hint |
SelectShow> |
The receivers won a Super Bowl ring, but the quarterback never did.
|
- Can you name the receiver who gained over 10,000 yards in his career, but the quarterback from whom he gained the most yards was… Quincy Carter?
- Among the top twenty-five leaders in career receiving yards, can you guess which player was the only one to fail to catch at least 20% of his yards from a single quarterback?
[continue reading…]
Tagged as:
Andre Rison,
Harold Jackson,
Joey Galloway,
Keyshawn Johnson,
Marvin Harrison,
Peyton Manning,
Reggie Wayne
{ }
by Chase Stuart
on July 18, 2012
No, this article isn’t an article about quarterbacks squaring off against ancient Greek mathematicians. Today, we’re going to look at quarterback win-loss records and see how they compare to their Pythagorean win-loss records.
Over 30 years ago, Bill James wrote that, on average, baseball teams’ true strengths could be measured more accurately by looking at runs scored and runs allowed than by looking at wins and losses. Since then, sports statisticians have applied the same thinking to all sports. The formula to calculate a team’s Pythagorean winning percentage is always some variation of:
(Points Scored^2) / (Points Scored ^2 + Points Allowed^2)
With the exponent changing from 2 to whatever number best fits the data for the particular sport. In football, that number is 2.53. We can look, for example, at the Pythagorean records for each team in the league last season, and line it up against their actual record:
Year | Tm | Record | Win% | PF | PA | Pyth Wins | Diff |
2011 | KAN | 7-9 | 0.438 | 212 | 338 | 3.76 | 3.24 |
2011 | GNB | 15-1 | 0.938 | 560 | 359 | 12.08 | 2.92 |
2011 | DEN | 8-8 | 0.500 | 309 | 390 | 5.71 | 2.29 |
2011 | OAK | 8-8 | 0.500 | 359 | 433 | 6.14 | 1.86 |
2011 | NWE | 13-3 | 0.813 | 513 | 342 | 11.78 | 1.22 |
2011 | NYG | 9-7 | 0.563 | 394 | 400 | 7.85 | 1.15 |
2011 | ARI | 8-8 | 0.500 | 312 | 348 | 6.9 | 1.1 |
2011 | TAM | 4-12 | 0.250 | 287 | 494 | 3.23 | 0.77 |
2011 | TEN | 9-7 | 0.563 | 325 | 317 | 8.25 | 0.75 |
2011 | NOR | 13-3 | 0.813 | 547 | 339 | 12.33 | 0.67 |
2011 | BAL | 12-4 | 0.750 | 378 | 266 | 11.34 | 0.66 |
2011 | ATL | 10-6 | 0.625 | 402 | 350 | 9.39 | 0.61 |
2011 | SFO | 13-3 | 0.813 | 380 | 229 | 12.52 | 0.48 |
2011 | CIN | 9-7 | 0.563 | 344 | 323 | 8.64 | 0.36 |
2011 | PIT | 12-4 | 0.750 | 325 | 227 | 11.4 | 0.6 |
2011 | MIA | 6-10 | 0.375 | 329 | 313 | 8.5 | -2.5 |
2011 | MIN | 3-13 | 0.188 | 340 | 449 | 5.3 | -2.3 |
2011 | PHI | 8-8 | 0.500 | 396 | 328 | 9.87 | -1.87 |
2011 | CAR | 6-10 | 0.375 | 406 | 429 | 7.44 | -1.44 |
2011 | SEA | 7-9 | 0.438 | 321 | 315 | 8.19 | -1.19 |
2011 | IND | 2-14 | 0.125 | 243 | 430 | 3.05 | -1.05 |
2011 | HOU | 10-6 | 0.625 | 381 | 278 | 11.03 | -1.03 |
2011 | SDG | 8-8 | 0.500 | 406 | 377 | 8.75 | -0.75 |
2011 | CLE | 4-12 | 0.250 | 218 | 307 | 4.74 | -0.74 |
2011 | WAS | 5-11 | 0.313 | 288 | 367 | 5.62 | -0.62 |
2011 | DAL | 8-8 | 0.500 | 369 | 347 | 8.62 | -0.62 |
2011 | BUF | 6-10 | 0.375 | 372 | 434 | 6.46 | -0.46 |
2011 | NYJ | 8-8 | 0.500 | 377 | 363 | 8.38 | -0.38 |
2011 | CHI | 8-8 | 0.500 | 353 | 341 | 8.35 | -0.35 |
2011 | STL | 2-14 | 0.125 | 193 | 407 | 2.1 | -0.1 |
2011 | JAX | 5-11 | 0.313 | 243 | 329 | 5.08 | -0.08 |
2011 | DET | 10-6 | 0.625 | 474 | 387 | 10.01 | -0.01 |
[continue reading…]
Tagged as:
Bart Starr,
Dan Marino,
Eli Manning,
Jake Plummer,
Peyton Manning,
Pythagorean,
Steve Young,
Terry Bradshaw,
Tom Brady,
Troy Aikman
{ }
by Chase Stuart
on July 4, 2012
Happy 4th of July! Before you head to your barbecue, I’d recommend you take a look at the incredible document our founders signed 236 years ago.
As far as football goes, today’s a good time for a data dump. The table below shows the career passing leaders for each franchise, organized by when the current leader last played for that team.
[continue reading…]
Tagged as:
Ben Roethlisberger,
Eli Manning,
Jay Cutler,
John Elway,
Mark Sanchez,
Matt Stafford,
Mike Vick,
Peyton Manning,
Robert Griffin III,
Sam Bradford,
Tim Tebow,
Tony Romo
{ }
by Chase Stuart
on June 29, 2012
And then John said to Peyton, 'Tim Tebow.'
Fifteen days into its infancy, Football Perspective has published fifteen posts. If you are enjoying the site, be sure to check back every day for a new post. You can also become one of the 850+ people to “like” Football Perspective on Facebook. You can also follow me on twitter. Enough of a site update: on to today’s post.
Unlike most sports writers, I don’t know a lot about what will happen this season. But there’s one thing I do know: the Denver Broncos aren’t going to rank 32nd again in pass attempts again. The Tebow Broncos, an offense with an inexperienced quarterback and a confused offensive coordinator, completed just 217 passes last season. That was the lowest in the league, and the lowest since the ’09 Jets, a team that boasted the number one rushing attack and defense in the league — and Mark Sanchez.
Setting aside those years where the league scheduled more games in the following season, the table below shows the teams with the largest increase in completions from one year (that’s the year listed in the table) to the next:
[continue reading…]
Tagged as:
Bill Walsh,
Broncos,
Peyton Manning,
Tim Tebow
{ }