The rush settings are used to determine the distribution of running plays between the various positions on the field. The positions that have the setting are Quarterback, Fullback, Wide Receiver 1, and Wide Receiver 2. The percentage value is a relative value used to determine the chance of each player in that player slot carrying the ball on a running play. The RB slot is locked in at 100%. If two players are set at 100%, it means they have an equal chance of carrying the ball. A player set at 20% would have one fifth the chance to carry as a player at 100%, and so on.