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Runner's interference is called at third base. |
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Catcher's interference is called at home plate. |
NCAA Rule 8-2-e states, "the batter becomes a base runner—if any defensive player interferes with the batter’s swing or prevents the individual from striking at a pitched ball. If a play follows the interference, the offensive team may elect to ignore the interference and accept the play. However, if the batter reaches first base and all other runners advance at least one base, the interference is ignored."
OBR: "Defensive interference is an act by a fielder that hinders or prevents a batter from hitting a pitch"..."The batter becomes a runner and is entitled to first base without liability to be put out (provided he advances to and touches first base) when—The catcher or any fielder interferes with him. If a play follows the interference, the manager of the offense may advise the plate umpire that he elects to decline the interference penalty and accept the play. Such election shall be made immediately at the end of the play. However, if the batter reaches first base on a hit, an error, a base on balls, a hit batsman, or otherwise, and all other runners advance at least one base, the play proceeds without reference to the interference." (5.05(b)(3)).
NFHS 5-1-2-b: "It is a delayed dead ball when—a catcher or any fielder obstructs a batter or runner; or obstructs the ball through use of detached player equipment." 8-1-1-e: "A batter becomes a runner [when]...the catcher or any other defensive player obstructs him. The coach or captain of the team at bat, after being informed by the umpire-in-chief of the obstruction, shall indicate whether or not he elects to decline the obstruction penalty and accept the resulting play. Such election shall be made before the next pitch (legal or illegal), before the award of an intentional base on balls, or before the infielders leave the diamond. Obstruction of the batter is ignored if the batter-runner reaches first and all other runners advance at least one base. (1) Any runner attempting to advance (i.e., steal or squeeze) on a catcher’s obstruction of the batter shall be awarded the base he is attempting."
Though OBR is the only code to specifically define "defensive interference," while NFHS insists on the term "catcher's obstruction," and NCAA calls the play "obstruction" in Rule 2-55, but "catcher's interference" in 8-2-e (in other words, the NCAA book contradicts itself in verbiage, but not in administration of the penalty), the plays and penalties are similar at all levels: in addition to giving the offense a choice of outcomes and disregarding the interference (OBR, half of NCAA)/obstruction (NFHS, the other half of NCAA) if the batter and all runners advance at least one base safely, all codes additionally award runners bases on this interference/obstruction if they are otherwise attempting to advance, and charge the pitcher a balk only if a runner is attempting to steal home at the time of the illegal catcher-batter/bat contact.
Hypothetical: Combine both plays and assume the interfered-with batter grounds to third base, where the baserunner collides with the fielder. The proper call would be to enforce the catcher's interference/obstruction penalty, since this occurred first and supersedes the later runner's interference (for instance, because the catcher's conduct contributed to the ball being hit to third base in the first place). If there is malicious contact between runner and fielder (NFHS), any applicable ejection penalties would stand (if the runner were to be ejected for MC, that player would be disqualified and a substitute runner placed at second base).
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