# Data Dictionary - Rosters

field | data_type | description
--- | --- | ---
season | numeric | NFL season. Defaults to current year after March, otherwise is previous year.
team | character | NFL team. Uses official abbreviations as per NFL.com
position | character | Primary position as reported by NFL.com
depth_chart_position | character | Position assigned on depth chart. Not always accurate!
jersey_number | numeric | Jersey number. Often useful for joins by name/team/jersey.
status | character | Roster status: describes things like Active, Inactive, Injured Reserve, Practice Squad etc
full_name | character | Full name as per NFL.com
first_name | character | First name as per NFL.com
last_name | character | Last name as per NFL.com
birth_date | date | Birthdate, as recorded by Sleeper API
height | character | Official height, in inches
weight | character | Official weight, in pounds
college | character | Official college (usually the last one attended)
high_school | character | High school
gsis_id | character | Game Stats and Info Service ID: the primary ID for play-by-play data.
espn_id | numeric | Player ID for ESPN API
sportradar_id | character | Player ID for Sportradar API
yahoo_id | numeric | Player ID for Yahoo API
rotowire_id | numeric | Player ID for Rotowire
pff_id | numeric | Player ID for Pro Football Focus
pfr_id | character | Player ID for Pro Football Reference
fantasy_data_id | numeric | Player ID for FantasyData
sleeper_id | character | Player ID for Sleeper API
years_exp | numeric | Years played in league
headshot_url | character | A URL string that points to player photos used by NFL.com (or sometimes ESPN)
ngs_position | character | Primary position as reported by the NextGen stats API.
week | numeric | The most recent week of that season that a player appeared on the roster.
game_type | character | The most recent game type of that season that a player appeared on the roster.
status_description_abbr | character | A code corresponding to a particular NFL status.
football_name | character | The nickname or first name typically used by a player.
esb_id | character | Player ID for Elias Sports Bureau
gsis_it_id | numeric | Player ID for the GSIS IT API
smart_id | character | Player ID hash for a player’s ESB ID
entry_year | numeric | The year a player first became eligible to play in the NFL.
rookie_year | numeric | The year a player lost their rookie eligibility.
draft_club | character | The team that originally drafted a player. NA if a player went undrafted in their draft-eligible year.
draft_number | numeric | The number pick that was used to select a given player.