Mark Tenally/Associated Press
The collective bargaining agreement between the NFL and the NFL Players Association only runs through the 2020 season, and NFLPA director DeMaurice Smith said there are still "significant" holdups as the sides work toward another pact.
"The major issues separating us are significant enough that we cannot recommend to our membership that we should accept a deal in this state at this time," he said in writing to the players, per Mark Maske of the Washington Post.
This article will be updated to provide more information on this story as it becomes available.