I want to come up with an at least slightly more objective scale than the one found here: https://www.profootballfocus.com/about/how-we-grade/

In the link, each play for each football player is graded on a scale of -2 to 2 with 0.5 point increments, leaving room for a lot of subjectivity.

I thought about using only two grades (0 = negative and 1 = positive), but what is the way to make the grading scale as objective as possible?

  • Do you have the resources to evaluate every play in the NFL? That's what is being done by the guys in the link you provided. I may not be understanding something but the framework laid out there seems pretty rigorous. What they neither mention nor report is the interrater reliability between the steps. In other words, how much do these guys agree on the ratings? This is the key piece of information missing that would enable a more objective evaluation of the success of their methodology. Why do you want to "improve" this? – DJohnson Nov 13 '15 at 11:30
  • Yes, I do have the resources to evaluate every play, just not as time efficiently as they probably can. I want to improve it because I feel like they are just watching film and combining that into a number with a decimal point to make it seem objective, when it's really not. – MJ95 Nov 13 '15 at 16:18

It's difficult for many positions in football. Let's say you have a defensive linesman. What is a high score? Does he get a high score only if gets through the offensive line? What if he makes a tackle on the RB? Which of these gets a higher score? It's subjective and/or based around the situation and analyzing every play from the perspective of every player would be time-consuming.

One way to do that is really simple (But purely objective) is to grant every player on the defense a score based on how many yards the offense got (and just score the offense for yards).

E.g. Offense loses 5 yards. Every player on offense gets -5, every player on defense gets 15. Incomplete Pass. Offense gets +0, defense gets 10. Offense gains 10. Offense gets 10, defense gets 0 Offense gains 40. Offense gets 40, defense gets -30.

It's a stupid system that won't tell you much about individual contribution, but it's objective. You might want to move the numbers around (i.e. offense only gets +5 when they gain 10 yards or whatever).

  • This is something I would definitely consider for evaluating units as a whole, and I could adapt it on a more granular level for individual players, or? – MJ95 Nov 13 '15 at 16:20

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