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In page Goalkeeper:

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The term "goal-tend" was used in early descriptions of American football positions to describe the defensive position farthest back from the line of scrimmage. Eventually the term became obsolete and was replaced by the term defensive fullback, then to its modern term free safety (or punt returner in kicking situations)[citation needed]. Unlike in soccer or Gaelic football, the goal-tend/safety does not physically protect the goalposts, as they are elevated above the ground and mostly out of the reach of any player (the National Football League also explicitly outlawed goaltending in 1985; no such rule exists in other levels of the game[citation needed]). Also, unlike other codes of football, goal-tends have no special ball-handling privileges.