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The tight end (TE) is a position in American football, Arena football, and formerly Canadian football, on the offense. The tight end is often seen as a hybrid position with the characteristics and roles of both an offensive lineman and a wide receiver. Like offensive linemen, they are usually lined up on the offensive line and are large enough to be effective blockers. On the other hand, they are eligible receivers adept enough to warrant a defense's attention when running pass patterns. Because of the hybrid nature of the position, the tight end's role in any given offense depends on the tactical preferences and philosophy of the head coach. In some systems, the tight end will merely act as a sixth offensive lineman rarely going out for passes. Other systems use the tight end primarily as a receiver, frequently taking advantage of the tight end's size to create mismatches in the defensive secondary. Many coaches will often have one tight end who specializes in blocking in running situations while using a better pass catching tight end in obvious passing situations. Offensive formations may have between zero and three tight ends at one time. If a wide receiver is present in a formation, but outside the tight end, the wide receiver must be positioned behind the line of scrimmage (see figure to right). If two tight ends are on the same side of the line of scrimmage, one must be behind the line of scrimmage. Also the offensive coordinator could use the tight end for a fullback. ==History== The advent of the tight end position is closely tied to the decline of the one-platoon system during the 1940s and '50s. Originally, a rule derived from the game's evolution from other forms of football limited substitutions. Consequently, players had to be adept at playing on both sides of the ball, with most offensive linemen doubling as defensive linemen or linebackers, and receivers as defensive backs. At that time, the receivers were known as either ends or flankers, with the end lining up wide at the line of scrimmage and the flanker positioned slightly behind the line usually on the opposite side of the field. As the transition from starters going "both ways" to dedicated offensive and defensive squads took place, players who did not fit the mold of the traditional positions began to fill niches. Those who were both good pass catchers and blockers but mediocre on defense were no longer liabilities; instead, a position evolved to capitalize on their strengths. Many were too big to be receivers yet too small for offensive linemen. Innovative coaches such as Paul Brown of the Cleveland Browns saw the potential of having a larger receiver lined up inside, developing blocking techniques and passing schemes that used the unique attributes of the tight end position. Greater use of the tight end as a receiver started in the '60s with the emergence of stars Mike Ditka and John Mackey. Until then most teams relied on the tight end's blocking as almost a sixth offensive lineman, rarely using them as receivers.〔(【引用サイトリンク】 Mike Ditka )〕 In addition to superb blocking, Ditka offered great hands receiving and rugged running after a completion. Over a 12-year career, he caught 427 passes for over 5800 yards and 43 touchdowns.〔 Mackey brought speed, with six of his nine touchdown catches in one season being breakaways over 50 yards.〔(【引用サイトリンク】 John Mackey )〕 Starting in 1980 the Coryell offense debuted tight end Kellen Winslow running wide receiver-type routes. Even with evolution of the position, prior tight ends were primarily blockers lined up next to an offensive lineman and given short to medium drag routes. Winslow was put in motion to avoid being jammed at the line, lined up wide, or in the slot against a smaller cornerback.〔Jaworski 2010, p.81.〕 Former Chargers assistant coach Al Saunders said Winslow was "a wide receiver in an offensive lineman's body."〔 Back then, defenses would cover Winslow with a strong safety or a linebacker, as zone defenses were not as popular.〔Jaworski 2010, p.93〕 Strong safeties in those times favored run defense over coverage speed. Providing another defender to help the strong safety opened up other holes.〔Jaworski 2010, pp.93–94〕 Winslow would line up unpredictably in any formation from a three point blocking stance to a two point receiver's stance, to being in motion like a flanker or offensive back.〔 Former head coach Jon Gruden referred to such multi-dimensional tight ends as "jokers", calling Winslow the first ever in the NFL.〔 Head coach Bill Belichick notes that the pass-catching tight ends that get paid the most are "all direct descendants of Kellen Winslow", and there are fewer tight ends now that can block on the line.〔Jaworski 2010, p.112〕 In the 90s, athletic Shannon Sharpe's prowess as a route-runner helped changed the way tight ends were used by teams. Consistently double-covered as a receiver, he became the first tight end in NFL history with over 10,000 career receiving yards. Tony Gonzalez and Antonio Gates pushed the position toward near wide receiver speed and power forward basketball skills. At 6' 7" Rob Gronkowski brought height, setting single-season tight end records in 2011 with 17 touchdowns—breaking Gates' and Vernon Davis' record of 13—and 1,327 receiving yards, surpassing Winslow's record of 1,290. Jimmy Graham that season also passed Winslow with 1,310 yards. Six of the NFL's 15 players with the most receptions that year were tight ends, the most in NFL history. Previous seasons usually had at most one or two ranked in the top. In the Arena Football League the tight end serves as the 3rd offensive lineman (along with the center and guard). Although they are eligible receivers they rarely go out for passes and are usually only used for screen passes when they do. As for Canadian football, tight ends are no longer used in the CFL. Tony Gabriel is a former great tight end in Canadian football. 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「tight end」の詳細全文を読む スポンサード リンク
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