Umpire Official (American football)

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an umpire watches play behind defensive line during game between ucla bruins , california golden bears.


the umpire (u) stands behind defensive line , linebackers (except described below nfl), observing blocks offensive line , defenders trying ward off blocks, looking holding or illegal blocks. prior snap, counts offensive players.


during passing plays, moves forward towards line of scrimmage play develops (1) penalize offensive linemen move illegally downfield before pass thrown or (2) penalize quarterback throwing ball when beyond original line of scrimmage. assists in ruling incomplete passes when ball thrown short.


as umpire situated of play s initial action occurs, considered hold physically dangerous officiating position. reason, nfl carried out experiments in 2001 preseason umpire placed in offensive backfield adjacent referee. in march 2010, nfl announced repositioning permanent, after 5 major injuries suffered umpires in 2009 (two concussions , 3 knee or shoulder surgeries). 2010-15, umpire returned defensive side of line of scrimmage during last 5 minutes of second half. in 2016, provision deleted, , umpire stands in offensive backfield on plays @ times of game.


in addition on-field duties, umpire responsible legality of of players equipment.








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