NFL Collective Bargaining Agreement

Article 21
Offseason Workouts

Section 5(d)
Miscellaneous

(d)

In all Phases of the offseason program, the on-field time limit begins when any coach begins to coach a player or players on the field, except that, during OTAs, players may stretch for up to 15 minutes prior to practice with the aid of strength and conditioning coaches (with no other coaches permitted on the field). This time will not count against the two-hour on-field time limit for OTA practices.