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  2. Two-platoon system - Wikipedia

    en.wikipedia.org/wiki/Two-platoon_system

    The two-platoon system is a tactic in American football enabled by rules allowing unlimited substitution adopted during the 1940s. The "two platoons", offense and defense, are an integral part of the game today.

  3. One-platoon system - Wikipedia

    en.wikipedia.org/wiki/One-platoon_system

    The one-platoon system, also known as "iron man football", is a rule-driven substitution pattern in American football whereby the same players were expected to stay on the field for the entire game, playing both offense and defense as required. Players removed for a substitute were lost to their teams for the duration of the half (until 1932 ...

  4. Substitute (association football) - Wikipedia

    en.wikipedia.org/wiki/Substitute_(association...

    The assistant referee indicating a substitution Fourth official notifying the referee of the details of the substitution. Substitutions are governed under Law 3 of the Laws of the Game in the (3) Substitution Procedure section. [21] A player can only be substituted during a stoppage in play and with the permission of the referee. The player to ...

  5. NCAA closes loophole that allowed Oregon to purposely induce ...

    www.aol.com/ncaa-closes-loophole-allowed-oregon...

    The NCAA football rules committee issued guidance Wednesday to close a loophole that allowed second-ranked Oregon to exploit an illegal substitution penalty late in its victory over Ohio State to ...

  6. NCAA announces in-season rules interpretation involving 12 ...

    www.aol.com/ncaa-announces-season-rules...

    Following Oregon football's dramatic win over Ohio State, the NCAA announced a rules clarification involving 12 defenders on the field.

  7. College football rule changes 2024: Coach-to-player ...

    www.aol.com/college-football-rule-changes-2024...

    Here's a look at college football's new rules for the 2024 season, including coach-to-player communication, a two-minute timeout and more

  8. Substitution (sport) - Wikipedia

    en.wikipedia.org/wiki/Substitution_(sport)

    Free substitution or rolling substitution is a rule in some sports that allows players to enter and leave the game for other players many times during the course of a game, generally during a time-out or other break in live play; and for coaches to bring in and take out players an unlimited number of times.

  9. 2021 college football rule changes

    www.aol.com/news/2021-college-football-rule...

    2021 college football rule changes. 2021 college football rule changes. Skip to main content. 24/7 Help. For premium support please call: 800-290-4726 more ways to ...