Run Affinity: An Analysis - The Basics (Thru Purdue)
So, I had some spare time at work and decided to look into something that I have been wondering for a while: does it seem like Rich Rod sticks to the run too much, even in games where we are losing? At this point I’m sure you all know RR likes to run the ball—duh. But how often, exactly, does he run the ball?
This analysis is just a basic overview of my dataset. I will follow up with more in-depth looks at point margins and down and distance, but I thought you all might be interested to see basic percentages for our offense through Purdue. If anyone has anything specific regarding playcalling vs. score margin vs. down and distance, let me know and I will see what I can do.
A few notes and stipulations on the dataset:
1.) All data is taken from Brian’s UFRs for games this season.
2.) Analysis stopped at end of UFR, so if Brian didn’t include it in his UFR (i.e. blowouts), it is not in my analysis. If Brian doesn’t think its worth looking at, well, neither do I.
3.) Plays in which either team got a penalty are included ONLY IF the ball was snapped, since if it didn’t, we can’t know what play was called.
4.) Every snap weighted the same regardless of time left in half/game, because my thought process, we are almost as likely to run the ball in a 2 minute drill as the rest of the game (almost, though not quite).
5.)2 pt. conversions left out.
Disclaimer: 4th down numbers are not very accurate due to low sample size.
Now, for a chart:
Run | Pass | % Run | |
1st Down | 230 | 103 | 69.1% |
2nd Down | 150 | 108 | 58.1% |
3rd Down | 44 | 92 | 32.4% |
4th Down | 6 | 7 | 46.2% |
Total | 430 | 310 | 58.1% |
A few things here are obvious. First, RR likes to run on 1st down (69.1% of the time). His affinity for running decreases every down, with the exception of 4th down. Most of the runs on 4th down are 4th and short, and the passes 4th and long.
Next, we will take a look at the distribution when the game is tied:
Run | Pass | % Run | |
1st Down | 51 | 21 | 70.8% |
2nd Down | 33 | 18 | 64.7% |
3rd Down | 8 | 16 | 33.3% |
4th Down | 1 | 2 | 33.3% |
Total | 93 | 57 | 62.0% |
What we see here is that RR is more likely to run the ball on every down when the game is tied than his average, except fourth down.
Now, we look at when we are winning the game:
Run | Pass | % Run | |
1st Down | 115 | 31 | 78.8% |
2nd Down | 78 | 43 | 64.5% |
3rd Down | 23 | 45 | 33.8% |
4th Down | 2 | 1 | 66.7% |
Total | 218 | 120 | 64.5% |
So, RR is more likely to run when we are winning, though not to a statistically significant level except on 1st down.
And when we are losing:
Run | Pass | % Run | |
1st Down | 50 | 51 | 49.5% |
2nd Down | 39 | 47 | 45.3% |
3rd Down | 11 | 31 | 26.2% |
4th Down | 3 | 4 | 42.9% |
Total | 103 | 133 | 43.6% |
So, RR is much less likely to run on all downs (except 4th) when we are losing.
This data all flushes out pretty much as expected, but I thought I'd share anyway. In the next edition, I will analyze run-calling affinity per down based on score margin. Stay tuned, folks for all upcoming editions of 2010 Playcalling so far: An Analysis.
P.S. If anyone is interested in seeing my whole dataset for validation or to do your own analysis, please leave a comment/message me (can you message people on here?) and I will be pleased to share!
EDIT: Title and Tags edited to be more informative
November 20th, 2010 at 10:12 AM ^
Nice analysis and it makes sense given how effective the Spread 'n Shred has been since at least Rich Rod's tenure at WVU. One thing that would be cool to see would be ypc data.
It is a run heavy offense, just not the road grader type of run offense we are used to seeing in the Big Ten. It also helps when you are averaging 5.9 ypc rather than the 4.3 or so Michigan used to average when Debord was running the show. It'd be interesting to see how those run distributions break down when we were playing Lloyd-ball...wouldn't be surprised if they were quite similar just far less effective on a ypc basis.
November 20th, 2010 at 10:50 AM ^
Since we throw with Tate significantly more, I think you have to separate out his snaps from Denard's. Could it be that Tate has been in more when we're down?
November 20th, 2010 at 11:36 AM ^
on first down when we lose because in our losses we have been down a lot of points.
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