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  2. Four-seam fastball - Wikipedia

    en.wikipedia.org/wiki/Four-seam_fastball

    Finger grip on a four-seam fastball Finger grip on a four-seam fastball. The four-seam fastball is designed purely for velocity; it travels to the batter's box with little or no "break" from straight-line flight—the intent being to challenge the batter's reaction time instead of fooling him with a pitch that breaks downward or to one side or the other.

  3. Strategy of American football - Wikipedia

    en.wikipedia.org/wiki/Strategy_of_American_football

    The special teams unit is a group of players who take the field during kickoffs, free kicks, punts, and field goal attempts. Most football teams' special teams include one or more kickers, a long snapper (who specializes in accurate snaps over long distances), kick returners who catch and carry the ball after it is kicked by the opposing team ...

  4. Football pitch - Wikipedia

    en.wikipedia.org/wiki/Football_pitch

    Association football pitch (1898) A football pitch or soccer field is the playing surface for the game of association football. Its dimensions and markings are defined by Law 1 of the Laws of the Game, "The Field of Play". [1] The pitch is typically made of natural turf or artificial turf, although amateur and recreational teams often play on ...

  5. American football rules - Wikipedia

    en.wikipedia.org/wiki/American_football_rules

    Because of these rules, various leagues of American football have enacted strict rules of uniform numbering so officials may more easily judge which players were eligible and which were not at the start of a play. For example, in college football, ineligible players wear numbers 50–79, while eligible receivers wear 1–49 or 80–99. Even ...

  6. Fastball - Wikipedia

    en.wikipedia.org/wiki/Fastball

    Average four-seam fastball velocity since 2008. The fastest pitch officially recognized by MLB was a 105.8 mph four-seam fastball thrown by Aroldis Chapman on September 24, 2010. [14] Since the mid-2000s, MLB has observed a significant increase in fastball velocity among pitchers.

  7. List of gridiron football rules - Wikipedia

    en.wikipedia.org/.../List_of_gridiron_football_rules

    A standard football game consists of four 15-minute quarters (12-minute quarters in high-school football and often shorter at lower levels, usually one minute per grade [e.g. 9-minute quarters for freshman games]), [6] with a 12-minute half-time intermission (30 minutes in the Super Bowl) after the second quarter in the NFL (college halftimes are 20 minutes; in high school the interval is 15 ...

  8. Changeup - Wikipedia

    en.wikipedia.org/wiki/Changeup

    Former pitcher and pitching coach Leo Mazzone stated: When a pitcher throws his best fastball, he puts more in it; the changeup is such that one throws something other than his best fastball. By having this mindset, the pitch will have less velocity on it in addition to the change in grips. This difference from what is expected by the arm ...

  9. Sprint football - Wikipedia

    en.wikipedia.org/wiki/Sprint_football

    Sprint football is a varsity sport played by United States colleges and universities, under standard American football rules. [1] Since the 2022 season, the sport has been governed by the Collegiate Sprint Football League and the Midwest Sprint Football League .