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  2. Yips - Wikipedia

    en.wikipedia.org/wiki/Yips

    They are more apparent in pitchers and catchers, players who touch the ball the most in the game, though position players have also been subject to the malady. Pittsburgh Pirates pitcher Steve Blass is an example; from 1964 to 1972, he was a dominant pitcher and All-Star; however, beginning in 1973, he suddenly lost his command, issuing 84 ...

  3. Hypnic jerk - Wikipedia

    en.wikipedia.org/wiki/Hypnic_jerk

    A hypnic jerk, hypnagogic jerk, sleep start, sleep twitch, myoclonic jerk, or night start is a brief and sudden involuntary contraction of the muscles of the body which occurs when a person is beginning to fall asleep, often causing the person to jump and awaken suddenly for a moment.

  4. Glossary of baseball terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_baseball_terms

    A pitcher who assumes a legal pitching position - the windup or set - may elect to deliver a pitch to the batter, legally disengage the rubber (by stepping back with the pivot foot and dropping his hands to his sides if he is in the windup position), or make a legal throw to a base in an attempt to put out a runner.

  5. Myoclonus - Wikipedia

    en.wikipedia.org/wiki/Myoclonus

    Myoclonus is a brief, involuntary, irregular (lacking rhythm) twitching of a muscle, a joint, or a group of muscles, different from clonus, which is rhythmic or regular. Myoclonus (myo-"muscle", clonus "spasm") describes a medical sign and, generally, is not a diagnosis of a disease.

  6. Rhythmic movement disorder - Wikipedia

    en.wikipedia.org/wiki/Rhythmic_movement_disorder

    The disorder often leads to bodily injury from unwanted movements. Because of these incessant muscle contractions, patients' sleep patterns are often disrupted. It differs from restless legs syndrome in that RMD involves involuntary muscle contractions before and during sleep while restless legs syndrome is the urge to move before sleep. RMD ...

  7. Baseball positions - Wikipedia

    en.wikipedia.org/wiki/Baseball_positions

    In the sport of baseball, each of the nine players on a team is assigned a particular fielding position when it is their turn to play defense. Each position conventionally has an associated number, for use in scorekeeping by the official scorer: 1 (), 2 (), 3 (first baseman), 4 (second baseman), 5 (third baseman), 6 (), 7 (left fielder), 8 (center fielder), and 9 (right fielder). [1]

  8. Pickoff - Wikipedia

    en.wikipedia.org/wiki/Pickoff

    A pitcher uses many tactics to attempt to disguise whether he is going to begin a pitch or a pickoff attempt. However, some deceptive actions are illegal and may be called a balk. Pickoff attempt on runner (in red) at first base. When there is a baserunner, the pitcher will pitch from the stretch, one of the pitching positions. For this example ...

  9. Pitching position - Wikipedia

    en.wikipedia.org/wiki/Pitching_position

    This is called coming set. After coming set, the pitcher takes a step toward home and delivers the pitch. Typically, pitchers from the set use a high leg kick, thus lunging toward home in pitching; a pitcher may instead release the ball more quickly by using the slide step, quickly stepping directly and immediately toward home and pitching. In ...