NFL team owners on Thursday voted to approve a potential new collective bargaining agreement (CBA) with the players that would last through 2029.

The key changes the owners want: expand the regular season from 16 games to 17 games; expand the playoffs from 12 teams to 14 teams; increase the players’ revenue share from 47% to 48%.

But the players do not appear to love those proposed changes.

On Friday, the 32 player reps in the NFL Players Association (NFLPA) were set to vote on the proposed CBA. Instead, they decided to delay the vote, a sign of tense negotiations to come. The NFLPA will meet again with the NFL next week at the NFL Combine in Indianapolis before the player reps vote on the proposed CBA.

Houston Texans defensive end JJ Watt, one of the league’s most visible stars, was quick and blunt in his Thursday night tweet: “Hard no on that proposed CBA.” Fellow NFL players including Denver Broncos cornerback Chris Harris, and free agents like Nick Moody and Michael Ola, retweeted Watt.

San Francisco 49ers cornerback Richard Sherman, another outspoken leader, retweeted Watt and added: “Leadership! I am with you! Please communicate with your team rep.”

Watt has not said which specific part of the proposed CBA is his issue, but the main sticking points for players appear to be the 17-game season and the revenue split. The expanded playoff structure, a source told ESPN, has been expected “for a long time” and “there wasn't a lot of disagreement to that issue.”

Sherman already said during Super Bowl weekend that he is against a 17-game season, and believes most players feel the same. “If that’s the point [the NFL is] negotiating on, then I think these negotiations are going to go a lot longer than anticipated,” he told reporters in Miami. “And not just 17, they’re really just saying 17 so they can get to 18. And so that’s two more opportunities for players to risk their bodies, put their bodies on the line.” Sherman added that the league “pretends that they care about” player safety.

Jacksonville Jaguars running back Leonard Fournette also tweeted out: “I disagree with the 17 games,” though he later deleted the tweet.

As Yahoo Sports explains, if the schedule goes to 17 games (which would begin with the 2022 season), a large number of star players “would be playing their 17th game of the season for a discount” because of a $250,000 cap on the 17th game check.

And while it’s obvious why team owners and the league’s broadcast partners like the idea (more games means more revenue), a longer season means more physical wear and tear for the players, though the owners are proposing fewer preseason games.