Columns shared verbatim across: espn_mbb_coach_season, espn_nba_coach_season.
| col_name | types | description |
| league | character | League slug. |
| season | integer | Season year. |
| coach_id | character | ESPN coach id. |
| uid | character | ESPN UID string. |
| first_name | character | First name. |
| last_name | character | Last name. |
| date_of_birth | character | Date of birth. |
| birth_city | character | Birth city. |
| birth_state | character | Birth state / region. |
| n_records | integer | Count of records entries. |
| person_ref | character | $ref to person resource. |
| college_ref | character | $ref to college. |
| team_ref | character | $ref to team-in-season. |