Where can I learn more about air yards?

I introduced receiver air yards at Rotoviz in August 2016. I also wrote about them in Febraury of 2017 at Rotoworld.

What is WOPR?

WOPR stands for Weighted Opportunity Rating. WOPR is a weighted combination of the share of team targets a player receives and the share of team air yards. You can read more about it at Rotoworld.

What is RACR?

RACR stands for Receiver Air Conversion Ratio. The formula is (Receiving Yards/Air Yards) . RACR is an efficiency metric that rolls up catch rate and yards after the catch into one number. It can also be thought of as the number of receiving yards a player creates for every air yard thrown at him. You can read more about RACR here.

Why are so many player's positions listed as Unknown?

This is mainly a byproduct of how the data is gathered. NFL.com doesn't list the positions for players that are no longer active in the league. I hope to have this fixed soon though.

Are the metrics adjusted for games missed?

Yes. WOPR, RACR, MS Air and Target Share are all calculated on a per week basis. If a player misses a week their numbers don't suffer.

Are the metrics adjusted for games where a player didn't get a target but still played?

No. I assume if a player did not get a target in a game that he didn't play enough to matter. This is not always a correct assumption. In some cases, a player's target share WOPR, RACR and MS Air may differ from other players with the same totals.

I have a question or a feature request. How can I contact you?

@friscojosh on Twitter or via email: friscojosh.0 at gmail.com