Moments in NFL History: Adoption of instant replay
NFL
Published on : 3/11/2026
Football is rooted in subjectivity. Fans, players and coaches have a different perspective on any given play. The game’s objectivity comes in the form of its 32-camera instant replay system, which battled through controversy to become a streamlined process powered by state-of-the-art technology.
Just like the camera and stopwatch used in the National Football League’s first experiments with replay, its implementation has been filled with starts and stops.
Ten years prior to its official adoption at a league meeting, the NFL’s director of officiating and Hall of Fame contributor ART McNALLY first experimented with the concept of using cameras to assist with on-field calls. Dubbed the “Father of Instant Replay,” McNally used only a stopwatch and a singular camera angle to gauge the feasibility of his idea. Due to a plethora of hurdles, including the expenses required to install extra cameras in every stadium, the program was dismissed.
A decade later, as missed calls continued to mount, the program was revived.
At least 21 votes were required to adopt instant replay and, on this date (March 11) in 1986, the owners voted 23-4-1 in favor of limited use of instant replay for one season. The vote, although overwhelmingly slanted, was not achieved without spirited debate and controversy.
“Some feel we are taking the human element out of the game and moving it to a booth in the press box,” Dallas Cowboys general manager future Hall of Famer TEX SCHRAMM said following the decision.
During its initial season in 1986, instant replay was called upon to review change of possessions, plays governed by the sidelines and penalties easily reviewable by the cameras (e.g. too many men on the field). The league averaged 1.6 reviews per game, with only 10 percent ending with a reversal of the ruling on the field.
Following its inaugural season, instant replay once again needed 21 votes at the offseason owners meeting to be reapproved to return for another year. It earned the mark exactly in 1987, earning a 21-7 vote, and barely survived until 1991, when it sputtered out after having 17 votes against its renewal.
“Basically, it was a great theory that didn’t work in practice,” said Norman Braman, then-owner of the Philadelphia Eagles.
After an unsuccessful revival in the early 1990s, it was abandoned again until 1999, when it was implemented with new standards. Correcting criticisms of past versions, coaches would now be charged a timeout for an unsuccessful challenge, and replay assist would initiate all reviews inside of the final two minutes of each half.
Since then, instant replay vastly has improved its efficiency by incorporating high-powered technology, helping league officials make informed and immediate decisions in the league’s biggest moments.
McNally’s legacy lives on in the Art McNally GameDay Center (AMGC), the hub for the NFL’s replay review process located at the league headquarters in New York. The center features a workstation for every live game, which equips a replay assistant and a supervisor with the tools necessary to be in communication with all seven on-field officials to confirm every play, including ball spotting.
A major improvement from the cash-strapped replay system in the 1980s and ’90s, the NFL now uses the Sony Hawk-Eye camera system, which syncs all possible camera angles and relays them to the AMGC hub. Using 32 total cameras, the system was further integrated this past season as the League shifted to virtual line-to-gain measurement. The advanced system allows for league officials to view every available camera angle for any game, fully synced with both the teams’ and coaches’ booths.
Mark Butterworth, the NFL’s vice president for replay who oversees the AMGC on gamedays, explained the League’s instant replay process in a recent interview.
When a coach throws a challenge flag, Butterworth said, the replay official in the stadium already has been monitoring the play, as every play automatically is reviewed for a “clear and obvious” call. The official then relays to the AMGC that the play is under a team-initiated review, prompting a simultaneous review in the stadium and at the League command center.
When a play is reviewed, all reviewable aspects are evaluated and assessed, regardless of if it was the primary focus of the challenge. To do this, the League control room uses Xbox controllers to quickly and accurately surf through the footage and determine the correct call.
“You can hit the X button, and it’ll take you to the all-29 [camera angle] or you can hit the B button to see what the broadcast is showing,” explained Butterworth. “You can select and tap any angle on a huge 55-inch screen. You can pause any time using the bumpers, and you’re able to really scrub through and look at every play.
“The technology is there for us to be efficient and accurate.”
Along with the implementation of omniscient cameras, the NFL uses advanced ancillary technology such as chips in the sky camera’s cables to accurately identify where a punt goes out of bounds.
“We have a geofence around the field,” Butterworth explained. “We know, within half of a foot, where an airborne punt goes out of bounds.”
Further aiding the League’s precise decision-making process is a groundbreaking skeletal monitoring system called Skeletrak. The system targets 29 points on a player’s and official’s body, examining player movements for injury while also providing insights to educate league personnel on how to better train players, coaches and officials.
Skeletrak, Sony’s Hawk-Eye system and the development of the AMGC each played a crucial role in the evolution of professional football. In a 2025 NFL season that saw 43,051 snaps, which prompted 327 review stoppages, advanced technology blended with human judgement to make consistently accurate and efficient decisions.
This article from the Hall of Fame Communications Team is part of recurring series celebrating memorable moments in NFL history.
Just like the camera and stopwatch used in the National Football League’s first experiments with replay, its implementation has been filled with starts and stops.
Ten years prior to its official adoption at a league meeting, the NFL’s director of officiating and Hall of Fame contributor ART McNALLY first experimented with the concept of using cameras to assist with on-field calls. Dubbed the “Father of Instant Replay,” McNally used only a stopwatch and a singular camera angle to gauge the feasibility of his idea. Due to a plethora of hurdles, including the expenses required to install extra cameras in every stadium, the program was dismissed.
A decade later, as missed calls continued to mount, the program was revived.
At least 21 votes were required to adopt instant replay and, on this date (March 11) in 1986, the owners voted 23-4-1 in favor of limited use of instant replay for one season. The vote, although overwhelmingly slanted, was not achieved without spirited debate and controversy.
“Some feel we are taking the human element out of the game and moving it to a booth in the press box,” Dallas Cowboys general manager future Hall of Famer TEX SCHRAMM said following the decision.
During its initial season in 1986, instant replay was called upon to review change of possessions, plays governed by the sidelines and penalties easily reviewable by the cameras (e.g. too many men on the field). The league averaged 1.6 reviews per game, with only 10 percent ending with a reversal of the ruling on the field.
Following its inaugural season, instant replay once again needed 21 votes at the offseason owners meeting to be reapproved to return for another year. It earned the mark exactly in 1987, earning a 21-7 vote, and barely survived until 1991, when it sputtered out after having 17 votes against its renewal.
“Basically, it was a great theory that didn’t work in practice,” said Norman Braman, then-owner of the Philadelphia Eagles.
After an unsuccessful revival in the early 1990s, it was abandoned again until 1999, when it was implemented with new standards. Correcting criticisms of past versions, coaches would now be charged a timeout for an unsuccessful challenge, and replay assist would initiate all reviews inside of the final two minutes of each half.
Since then, instant replay vastly has improved its efficiency by incorporating high-powered technology, helping league officials make informed and immediate decisions in the league’s biggest moments.
McNally’s legacy lives on in the Art McNally GameDay Center (AMGC), the hub for the NFL’s replay review process located at the league headquarters in New York. The center features a workstation for every live game, which equips a replay assistant and a supervisor with the tools necessary to be in communication with all seven on-field officials to confirm every play, including ball spotting.
A major improvement from the cash-strapped replay system in the 1980s and ’90s, the NFL now uses the Sony Hawk-Eye camera system, which syncs all possible camera angles and relays them to the AMGC hub. Using 32 total cameras, the system was further integrated this past season as the League shifted to virtual line-to-gain measurement. The advanced system allows for league officials to view every available camera angle for any game, fully synced with both the teams’ and coaches’ booths.
Mark Butterworth, the NFL’s vice president for replay who oversees the AMGC on gamedays, explained the League’s instant replay process in a recent interview.
When a coach throws a challenge flag, Butterworth said, the replay official in the stadium already has been monitoring the play, as every play automatically is reviewed for a “clear and obvious” call. The official then relays to the AMGC that the play is under a team-initiated review, prompting a simultaneous review in the stadium and at the League command center.
When a play is reviewed, all reviewable aspects are evaluated and assessed, regardless of if it was the primary focus of the challenge. To do this, the League control room uses Xbox controllers to quickly and accurately surf through the footage and determine the correct call.
“You can hit the X button, and it’ll take you to the all-29 [camera angle] or you can hit the B button to see what the broadcast is showing,” explained Butterworth. “You can select and tap any angle on a huge 55-inch screen. You can pause any time using the bumpers, and you’re able to really scrub through and look at every play.
“The technology is there for us to be efficient and accurate.”
Along with the implementation of omniscient cameras, the NFL uses advanced ancillary technology such as chips in the sky camera’s cables to accurately identify where a punt goes out of bounds.
“We have a geofence around the field,” Butterworth explained. “We know, within half of a foot, where an airborne punt goes out of bounds.”
Further aiding the League’s precise decision-making process is a groundbreaking skeletal monitoring system called Skeletrak. The system targets 29 points on a player’s and official’s body, examining player movements for injury while also providing insights to educate league personnel on how to better train players, coaches and officials.
Skeletrak, Sony’s Hawk-Eye system and the development of the AMGC each played a crucial role in the evolution of professional football. In a 2025 NFL season that saw 43,051 snaps, which prompted 327 review stoppages, advanced technology blended with human judgement to make consistently accurate and efficient decisions.
This article from the Hall of Fame Communications Team is part of recurring series celebrating memorable moments in NFL history.