Learning Level: INTERMEDIATE
 
Personnel Groups refer to the different combinations of running backs, tight ends, and wide receivers.  Because different formations require different types of players, it makes sense to substitute the correct personnel rather than play someone at a position in which he is less skilled.  Furthermore, personnel groups allow you to directly involve more than your eleven starters into your game plan.  While certain players (such as your backup TE) might have a limited role in the offense, these personnel groups allow him to know he will be able to contribute to a certain amount of your offense.  Additionally, personnel groups help the offense maintain unpredictability.
    In this system, personnel groups are referenced by a two-digit number.  The first is the number of running backs.  The second is the number of tight ends.  The number of wide receivers is by definition the difference between the number of skill players (five) and the total number of running backs and tight ends.  For ease of play-calling, each personnel group is designated by a name.  Falcon is the base single-back formation. Eagle is the base two-back formation.
 

 The personnel group name should be called by the offensive coordinator prior to calling the play as a method of getting the correct personnel into the huddle.  Another way of displaying this chart would be to list each formation, followed by the appropriate personnel group, as a means of easily determining which group to send in for the appropriate formation and play.
 

For accountability purposes, the play-calling sheet should include a small matrix, similar to the one below, which designates which personnel are assigned to each group.
 

See also How to Be Unpredictable and Disguise Formations by Using Multiple Personnel Groups by Ralph Friedgen (Offensive Coordinator), Bill O'Brien (Running Backs) and Eddie Wilson (Tight Ends) of Georgia Tech.