Talks between the league and the officials broke down after two mediation sessions. The two sides had been negotiating since October and have said they expect a new collective bargaining agreement in time for the upcoming season.
But that optimism has disappeared.
A session was held Sunday under the auspices of the Federal Mediation and Conciliation Service, and the NFLRA said the league ''terminated negotiations'' on Monday.
The league said that regional training sessions for replacement officials would begin this month ''to ensure that there is no disruption to NFL games this season.''
''Our goal is to maintain the highest quality of officiating for our teams, players, and fans, including proper enforcement of the playing rules and efficient management of our games,'' the league said in a statement.
The NFL's search would target retired college officials and perhaps current ones who would be qualified to work professional games.
Referees counsel Mike Arnold called those replacements ''amateur referees.''
''It is unfortunate that as referees' responsibilities are expanded that the NFL would jeopardize player health and safety and the integrity of the game by seeking amateur, under-qualified referees to administer professional games,'' Arnold said.
In 2001, the league used replacement officials for one preseason game, then the first weekend of the regular season. An agreement was then reached, and another CBA was negotiated in 2006 that expired after last season.