when was instant replay first used in the nfl
Replay review in gridiron football The National Football League first adopted a limited Instant Replay system in 1986,[2] though the current system began in 1999, bringing in the opportunity to "challenge" on-field calls of plays. The current system mirrors a system used by the now defunct USFL in 1985. Each coach is allowed two opportunities per game to make a coach's challenge. Before the 2004 NFL season, the instant replay rule was slightly changed to allow a third challenge if both of the original two challenges were successful.
Marcus Álvarez
Two-minute warning The origins are from the early years in the NFL when the official game time was kept by a member of the officiating crew, with the stadium clock being unofficial. Its purpose was a checkpoint to ensure that the teams knew how much time remained in the game. In the early 1960's the upstart American Football League made the stadium clock the official game time, a change followed later in the decade by the NFL. By then, television was an important factor in professional football, so the two-minute warning was retained as a commercial break and to serve as "tension building" time, and thus has become an important part of the game's flow.[3]
Craig MacTavish He is notable as the last NHL player to not wear a helmet during games.[1][2][3]