After the NFL owners approved a new collective bargaining agreement, all of the pressure was on the players to do the same.
But Ravens wide receiver Donte' Stallworth said the players couldn't vote Thursday night because the NFL hadn't given them all of the documents to review.
"We feel like we've been backed into the corner," Stallworth said. "Now, it's on the players. And now, fans are mad because they want the players to sign the deal. But we haven't been able to read it thoroughly."
The players received all of the documents after their conference call Thursday night and will vote on the owner-approved CBA on Friday, according to ESPN.
"Our leadership isn't going to sign anything just because it's time to go to training camp," Ravens linebacker Jarret Johnson said. "They need to quit screwing around."
According to NFLPA leader DeMaurice Smith, issues such as "workers' compensation, economic issues and end of deal terms" still need to be resolved.
Ravens cornerback Domonique Foxworth, who also serves on the NFLPA executive committee, vented his frustration to fullback Le'Ron McClain on Twitter.
"Man, they don't make anything easy," Foxworth wrote.
If the sides don't reach an agreement by next week, some preseason games could be at risk.
The Ravens' first preseason game is scheduled to take place in three weeks.
"We're not going to be put under the fire to try to make a decision," Ravens wide receiver Derrick Mason said in an ESPN interview. "We're going to look at what the owners have signed off on and we're going to take this very seriously. We're not up against any time constraint. We're going to take this very delicately."