Where does this come from, and can I check it?

It was dropped in 1992 and brought back in 1999 in a different form. The figure is taken from National Football League, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

Is this really a sports fact?

Yes. It sits on the Sports shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.

What else can I read about it?

The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.

Mondo Knows Facts

The NFL first used instant replay in 1986

It was dropped in 1992 and brought back in 1999 in a different form The original system let an official in the booth review calls, but it slowed games and was unpopular. Coaches were given challenges when replay returned, with a limited number per game. Since 2012 all scoring plays and turnovers have been reviewed automatically. It sits in Mondo's sports collection, one of 200 facts that each trace back to the reference below.

Where this comes from

National Football League

Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.

Go further

Technology trivia

More facts like this

NFL players had to wear helmets from 1943The rule arrived after the league had experimented with them for a decade The NFL draft began in 1936Nine teams picked in a Philadelphia hotel to stop bidding wars for players An American football field is 100 yards longTwo 10-yard end zones sit beyond it, and the field is 53 and a third yards wide The forward pass was legalised in 1906It was brought in to open up a game that had become brutal and static The first Super Bowl was played in 1967Green Bay beat Kansas City in a game not yet called the Super Bowl The NFL adopted the two-point conversion in 1994College football had used it since 1958, and the pros held out for decades

Tags: american-football, technology, officiating

The NFL first used instant replay in 1986: the short answers

Where does this come from, and can I check it?: It was dropped in 1992 and brought back in 1999 in a different form. The figure is taken from National Football League, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a sports fact?: Yes. It sits on the Sports shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.