| season | numeric | 4 digit number indicating to which season(s) the
specified timeframe belongs to. | 
| week | numeric | Week in season that depth chart is for. For 17 week
seasons, week 18 reflects the end-of-season depth charts, and week 19-on
reflect postseason depth charts. For 18 week seasons, week 19 reflects
end-of-season depth charts. | 
| team | character | Team that depth chart belongs to | 
| season_type | character | REG or POST indicating if the depth chart belongs to
regular or post season. | 
| position | character | Position of player | 
| depth_chart_position | character | Position of player listed on depth chart | 
| formation | character | Side of ball that player is on (offense, defense,
special teams) | 
| depth_team | numeric | Position on depth chart | 
| jersey_number | numeric | Jersey number of player | 
| full_name | character | Full name of player | 
| first_name | character | First name of player | 
| last_name | character | Last name of player | 
| gsis_id | numeric | Game Stats and Info Service ID: the primary ID for
play-by-play data. |