The maximum amount of yards a player can gain on a standard play. This can be exceeded with a big play by the big play factor.
  
  
  
    The percentage probability on each play that a sack will occur
  
  
  
    The number of yards lost when a sack occurs.
  
  
  
    The percentage probability on each play that a big play will occur.
  
  
  
    The multiple applied to the yards gained when a big play occurs. For example if the factor is 3 and a big play occurs on a 4 yard play, the player will gain 12 yards.
  
  
  
    The percentage probability on each play that a goal line stand will occur.  A goal line stand can only occur when a player is within 5 yards of the end zone.
  
  
  
    The negative yards when a goal line stand occurs.