The Seahawks were fined $100,000 for not properly following concussion protocol with quarterback Russell Wilson during a game in November.

The NFL and NFLPA announced their decision on Thursday after an investigation that lasted more than a month. Along with the financial penalty, the Seahawks’ coaching and medical staffs will attend remedial training regarding the concussion protocol.

The Seahawks are the first team fined for such a violation.

The investigation determined that Wilson was allowed back on the field before a required evaluation was performed on the sideline.

Richardson not forced to sell: The NFL said it isn’t forcing Panthers owner Jerry Richardson to sell the team while he is under investigation for sexual and racial misconduct in the workplace.

NFL spokesman Joe Lockhart said during a conference call that “there was no pressure from the league on Mr. Richardson” to sell his team. Lockhart said Richardson “came to the conclusion over that weekend that putting his team up for sale was what he wanted to do. We found out about it shortly before the announcement came out.”

Lockhart said the league didn’t know about the allegations against Richardson until Friday, the same day the Panthers put out a news release first announcing its own investigation of Richardson’s alleged workplace misconduct. That was followed on Sunday by a Sports Illustrated report that detailed Richardson’s alleged misconduct.

No card zone: The NFL has told its officials not to use index cards or any other paper to aid in measurements.

In Sunday night’s Cowboys-Raiders game, veteran referee Gene Steratore tried to slide what appeared to be an index card between the tip of the ball and the end of the chain while measuring for a first down. When the card didn’t slide through, Steratore signaled a first down for the Cowboys.

He said he had decided it was a first down before the odd measurement.

Moon denies claims: Hall of Fame quarterback Warren Moon denies he sexually harassed a former assistant.

Moon did an extensive radio interview on KIRO-FM to address claims of sexual assault brought in a lawsuit by Wendy Haskell.

Moon said Thursday he had a friendship with Haskell prior to her being hired as his assistant last summer at Sports 1 Marketing and that their relationship was never sexual.

Extra points: The Saints placed S Kenny Vaccaro on IR. He has been hampered by groin injuries but has 60 total tackles. ... Bears TE Zach Miller continues to take steps in his recovery from an injury that nearly cost him his left leg. Miller posted video of himself walking on his own on social media over the weekend. He said he’s trying to build strength around the knee before he has one final operation and taking a few steps “was big.” ... The Giants interviewed ESPN analyst Louis Riddick for their GM job.