The NFL and its on-field referees union failed to reach an agreement when they met Saturday in New York, and the league said it is proceeding with replacement officials.
The NFL locked out the referees in early June, then hired replacements, whose work in exhibitions has been heavily criticized.
"We met with the NFL this morning and discussed various potential solutions to reach a new collective bargaining agreement," Michael Arnold, lead negotiator for the NFL Referees Association, said in a prepared statement. "Unfortunately, we were unable to reach any agreement.
"We are disappointed because it means that our members will not be back on the field for Week 1 of the regular season due to the NFL's continuing lockout. We remain willing to negotiate with the NFL in order to reach a fair agreement."
Commissioner Roger Goodell was among the league officials involved in Saturday's session.
"Commissioner Goodell and other NFL staff members concluded three days of talks today with representatives of the NFLRA without reaching an agreement," NFL spokesman Greg Aiello said. "No further talks are scheduled. We are proceeding with the replacement officials."
In 2001, the NFL used replacements for the first week of the season before a contract was completed. The speed of the game and the amount of time starters are on the field increase exponentially for real games, making the replacements' task more challenging.
The standoff involves disputes over compensation, pensions and a league proposal to add more officials to give it more flexibility to replace those who it believes are underperforming.
Seahawks: Kellen Winslow was released, quashing the hopes he would team with Zach Miller and give Seattle a formidable set of tight ends.
Winslow was scheduled to make $3.3 million in base salary in 2012, following his trade from Tampa Bay to Seattle in May. He didn't have much impact during preseason games, finishing with just three catches for 34 yards and a touchdown.
Winslow has battled knee problems throughout his career, and his practice time was closely monitored as Seattle tried to get him ready for the season.
Trades: The New England Patriots acquired receiver Greg Salas from St. Louis for an undisclosed draft pick.
Salas played in six games for the Rams last season, finishing with 27 receptions for 269 yards.
Cornerback was an area of concern for the Vikings with Antoine Winfield entering his 14th season after missing the final 10 games last season because of injury and Chris Cook struggling with injuries and off-the-field issues.
Buccaneers: Tampa Bay signed running back D.J. Ware, a reserve for the New York Giants the past five seasons.
Browns: If rookie running back Trent Richardson can practice this week, he will face Philadelphia in the season opener, coach Pat Shurmur said.
Richardson, the No. 3 pick in the draft, underwent arthroscopic surgery on his left knee Aug. 9.
Shurmur said Richardson has been running -- and even taking part in some contact drills.
"If he's ready, he'll play," Shurmur said.