<P> The spot of the conversion has also changed through the years . In 1924, NCAA rules spotted the conversion at the 3 - yard line, before moving it back to the 5 - yard line in 1925 . In 1929, the spot was moved up to the 2 - yard line, which the NFL had done until 2014 . In 1968, the NCAA diverged from the NFL rules in moving the spot back to the original 3 - yard line . Canadian rules originally spotted the conversion at the 5 - yard line, which remains closer than in the American code as the goalposts are at the front of the end zone . In 2015, to make conversion kicks harder, the NFL and CFL moved the spot of the kick to the 15 and 25 - yard lines, respectively . In addition, the CFL moved the spot for a two - point conversion up to the 3 - yard line to entice more teams to go for 2 points as opposed to one . </P> <P> The goalposts were originally located on the goal line; this led to many injuries and sometimes interfered with play . The NCAA moved the goal posts to the rear of the end zone in 1927 . The NFL (still following NCAA rules at the time) followed suit, but moved the posts back to the goal line starting in the 1932 NFL Playoff Game, a change made necessary by the size of the indoor Chicago Stadium and kept when the NFL rules stopped mirroring the NCAA rules in 1933 . The NFL kept the post at the goal line until 1974, when they were moved back to the rear of the end zone . This was partly a result of the narrowed hashmark distance made in 1972, which had made for easier field - goal angles . The Canadian game still has posts on the goal line . </P> <P> The width of the goalposts and the hashmarks have also varied throughout the years . In 1959, the NCAA goalposts were widened to 23 feet 4 inches (7.11 m), the standard width for high school posts today . In 1991, the college goalposts were reduced in width to 18 ft 6 in (5.64 m), matching the NFL . For the 1991 and 1992 seasons, this meant potentially severe angles for short field goal attempts, since the hashmark width remained at 53 ft 4 in (16.26 m). In 1993, the NCAA narrowed the distance between the hashmarks to 40 ft (12.19 m), matching what was the width of hashmarks in the NFL from 1945 through 1971; the NFL narrowed the hashmarks in 1972 to goalpost width at 18.5 feet (5.64 m). In the CFL, the hashmarks are 51 feet (16 m), but the field is 195 feet (59 m) in width, 35 feet (11 m) wider than the American field . </P> <P> The NFL increased the height of the uprights above the crossbar to 20 feet (6.10 m) in 1966 and 30 feet (9.14 m) in 1974 . In 2014, they were raised five feet to 35 feet (10.67 m) after the adoption of a proposal by New England Patriots head coach Bill Belichick . </P>

Who has the longest kick return in nfl history