<P> Finally, on errant passes, receivers must frequently play a defensive role by attempting to prevent an interception . If a pass is intercepted, receivers must use their speed to chase down and tackle the ball carrier to prevent him from returning the ball for a long gain or a touchdown . </P> <P> In the NFL, wide receivers can use the numbers 10--19 and 80--89 . </P> <P> The wide receiver grew out of a position known as the end . Originally, the ends played on the offensive line, immediately next to the tackles . By the rules governing the forward pass, ends (positioned at the end of the line of scrimmage) and backs (positioned behind the line of scrimmage) are eligible receivers . Most early football teams used the ends as receivers sparingly, their position often left them in heavy traffic with many defenders around . By the 1930s, some teams were experimenting with moving one end far out near the sideline, to make them more open to receive passes . These split ends became the prototype for the modern wide receiver . Don Hutson, who played college football at the Alabama and professionally with the Green Bay Packers was the first player to exploit the potentials of the split end position, and is widely credited as inventing the wide receiver position . </P> <P> As the passing game evolved, a second wide receiver position was added . While it is possible to move the opposite end out wide for a second split end position most teams preferred to leave that end in close to provide extra blocking protection on the quarterback's blind side . That player was essentially playing the modern day tight end position . Instead of moving the blind side end out, one of the three running backs was split wide instead, creating the flanker position . The flanker lined up off the line of scrimmage like a running back or quarterback, but split outside like a split end . Lining up behind the line of scrimmage gave flankers some advantages . Flankers have more "space" between themselves and a pressing defensive back, so cornerbacks cannot as easily "jam" them at the line of scrimmage . This is in addition to being eligible for motion plays, allowing for the flanker to move laterally before and during the snap . Elroy "Crazy Legs" Hirsch is one of the earliest players to successfully exploit the potentials of the flanker position as a member of the Los Angeles Rams during the 1950s . </P>

Name an nfl receiver who has a lot of touchdowns