Running back Marshawn Lynch #24 of the Seattle Seahawks sits at his podium during a Super Bowl XLIX media availability at the Arizona Grand Hotel on January 28, 2015 in Chandler, Arizona

Running back Marshawn Lynch #24 of the Seattle Seahawks sits at his podium during a Super Bowl XLIX media availability at the Arizona Grand Hotel on January 28, 2015 in Chandler, Arizona

*During Tuesday’s Super Bowl media day, Marshawn Lynch answered every question with, “I’m just here so I won’t get fined.”

Turns out, the Seattle Seahawks running back may get fined for something else entirely.

His hat.

Marshawn Lynch #24 of the Seattle Seahawks addresses the media at Super Bowl XLIX Media Day Fueled by Gatorade inside U.S. Airways Center on January 27, 2015 in Phoenix, Arizona

Marshawn Lynch #24 of the Seattle Seahawks addresses the media at Super Bowl XLIX Media Day Fueled by Gatorade inside U.S. Airways Center on January 27, 2015 in Phoenix, Arizona

Sources tell ESPN that, after the Super Bowl, the league will review whether the hat Lynch wore during media day, which bears his “Beast Mode” logo, was permissible. If the NFL rules that Lynch used media day to promote a brand that was not approved by the league, he could face a significant fine.

At today’s media availability, Lynch wore another hat with the Beast Mode logo, with different colors. The appearance lasted about five minutes. His chosen response to all questions today was: “You know why I’m here,” before concluding the session with “Thank you, I appreciate it,” and leaving.

The NFL makes clear to players that they cannot wear brands that conflict with league partners on the field during games and during postgame interviews. That is extended to Super Bowl media day, where a record number of cameras are on the players.

That’s why the league fined Chicago Bears linebacker Brian Urlacher $100,000 for wearing a Vitaminwater hat on his podium during Super Bowl XLI in 2007. The league had, and still has, an official drink deal with Pepsi, which also owns Gatorade.

Lynch’s Beast Mode hat was selling on the clothing line’s website and advertised as “the hat Marshawn wore during the 2015 SB Media Day.” The hat, which costs $33, sold out and the site noted Wednesday morning that it was hoping to restock it as soon as possible. Lynch owns four trademarks to the phrase “Beast Mode” and has filed for three additional trademarks with the U.S. Patent and Trademark Office.

The league frowns on players using what is considered a league event to promote something that it has not approved. And despite Lynch’s short time on the podium Tuesday and Wednesday, he certainly got a lot of free advertising from news clips and social media showing the hats.

Lynch’s situation isn’t exactly parallel to Urlacher’s in that Lynch wasn’t wearing a brand that competes with a league sponsor. The hat is made by New Era, which is the official hat of the NFL.

Lynch is no stranger to fines. In November, he was fined $50,000 for not talking to the media and another $50,000 that was being withheld by the league from the 2013 season that was contingent upon his future cooperation with the press. Lynch was also fined $11,050 for grabbing his crotch after a touchdown in a late December game against the Arizona Cardinals. He was fined $20,000 for doing the same thing in the NFC Championship Game.