NFL Players Association
1. Non-Football Injury or Illness
A club may place a player on the Non-Football Injury or Illness (NFI) list if the player fails the club’s pre-season physical because he sustained an injury unrelated to football. A player on NFI will not be entitled to receive his salary and is prohibited from practice until the three-week period beginning the day after his club’s sixth regular-season game, during which time he may be restored to the club’s Active/Inactive List. It is not unusual for players to find themselves on NFI after sustaining injuries in the off-season doing other activities other than football.
2. Physically Unable to Perform (PUP)
A player who fails his club’s pre-season physical at the start of training camp may be placed by his club on the Physically Unable to Perform list. A player on PUP is eligible to receive his salary, but he is ineligible to participate in practices or games. However, a player on PUP is permitted to practice with his club and may be restored his club’s Active/Inactive list during a three-week period beginning the day after the sixth regular-season game and ending after the ninth regular-season game.