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The try (American football, also known as point(s) after touchdown, PAT) or convert (Canadian football) occurs immediately after a touchdown during which the scoring team is allowed to attempt to score one extra point by kicking the ball through the uprights in the manner of a field goal, or two points by bringing the ball into the end zone in the manner of a touchdown; depending on league rules, one point may also be scored by manner of a safety. If the try or conversion is scored by kicking the ball through the uprights, the team gets an additional one point for their touchdown, bringing their total for that score from six points to seven. If two points are needed or desired, a two-point conversion may be attempted by running or passing from scrimmage. A successful touchdown conversion brings the score's total to eight. Whether a team goes for one or two points, most rules regarding scrimmage downs, including scoring touchdowns and field goals, apply as if it were a normal American fourth-down or Canadian third-down play. Exceptions, including cases where the defense forces a turnover during a conversion attempt, vary between leagues and levels of play. ==History== The try/convert is among the oldest parts of the game of gridiron football and dates to its rugby roots. In its earliest days, scoring a touchdown was not the primary objective but a means of getting a free kick at the goal (hence why the name "try," more commonly associated with rugby today, is still used in American football rule books), and thus early scoring rubrics for the game gave more points to the subsequent kick than the actual advancement of the ball into the end zone. The related term "conversion" is still used in both rugby union and rugby league to refer to extra points scored by kicking the ball through the posts after a try has been scored. By the start of the 20th century, touchdowns had become more important and the roles of touchdown and kick were reversed. By this time the point value for the after-touchdown kick had reduced to its current one-point value while the touchdown was now worth five. (This later increased to six points in American football in 1912 and in Canadian football in 1956.) Although a successful kick is only worth one point, missing one can decide the outcome of the game. Perhaps the most famous example to this was the 2003 game between the New Orleans Saints and Jacksonville Jaguars where, after scoring a touchdown as time expired as a result of the multiple-lateral River City Relay, Saints kicker John Carney missed the extra point, giving the Jaguars a 20-19 victory. On November 11, 1979, the New York Jets lost to the Buffalo Bills 14-12 - the difference coming from two missed extra points by place kicker Toni Linhart. Linhart, who had been cut earlier in the 1979 season by the Baltimore Colts and was signed by the Jets to fill in for the injured Pat Leahy, never played another game in the NFL. Another 2003 game, this one between the Carolina Panthers and Tampa Bay Buccaneers, was sent to overtime after what would have been a game-winning extra point was blocked; the Panthers won the game in overtime 12-9. A 2005 game between the Green Bay Packers and Tampa Bay Buccaneers is another notable exception, as the Buccaneers won 17-16, the difference being Ryan Longwell missing an extra point after a Packers touchdown. The CFL and NFL both made major changes to the rules governing conversions prior to their respective 2015 seasons, reducing and eliminating some of the differences between the two leagues in the process as discussed below. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Conversion (gridiron football)」の詳細全文を読む スポンサード リンク
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