WOPR: Weighted Opportunity Rating. A weighted combination of target share and market share of team air yards.
Tgt Share: Target share. A player's percentage of team targets.
MS Air: Market share of air yards. A player's percentage of team air yards.
RACR: Receiver Air Conversion Ratio. Measures how efficiently a player turns an air yard into a receiving yard.
aYPT: Air Yards per Target. Conceptually identical to aDOT. Measures the average depth of a player's targets.
PPR Points: Points per reception fantasy points. Excludes rushing yards, rushing TDs and fumbles.