NFL Collective Bargaining Agreement

Article 23
Preseason Training Camps

Section 6(c)
Five-Day On-Field Acclimation Period

(c)

In the above examples, if any rookie, first-year player, quarterback, injured player or veteran player under contract reports to training camp after his assigned reporting date but prior to the conclusion of the five-day acclimation period for veteran players who reported on the mandatory reporting date for veteran players (July 29 in the above example), the player would still be required to undergo five days of acclimation, or as much of the five-day acclimation period that remains for veteran players who reported on July 29. If such a late-reporting player reports to camp after the conclusion of the July 29- August 2 acclimation period for veteran players, the player is not required to undergo any acclimation period. Such a player may practice and play (including the wearing of pads) immediately after passing a physical examination that allows such participation.