While barely saying a word, the Seattle Seahawks running back has created a run on the "Beast Mode" caps he's been wearing at Super Bowl press appearances.
The two baseball caps Lynch wore this week while answering reporters' questions with single scripted lines have sold out on Lynch's website, where they're part of his own Beast Mode apparel line.
Buffalo-based New Era Cap Co. makes the caps for the football player and says more are on the way.
"Over the past 20 years, there've been different moments in time where a celebrity is seen wearing a different cap and the next day people are clamouring to find that product," Stuart Domanowski, football category director at New Era, said Thursday.
One of the earliest times was when movie director Spike Lee wore a red Yankees cap during a World Series game in the 1990s.
The Lynch case is somewhat different, Domanowski said, because the caps are a collaboration of two brands. Instead of a team logo, they feature Lynch's angular Beast Mode logo on New Era styles. Lynch and New Era designers worked together on colour combinations and fabrics.
The grey-billed navy cap Lynch wore while repeatedly telling media day reporters, "I'm just here so I won't get fined," is a 9Fifty snapback style that retails for $33.
"Yes, this is the hat Marshawn wore during the 2015 SB Media Day," the website says.
Lynch could be fined for wearing the hat if the National Football League deems it broke the rule requiring players to wear team-issued apparel on media day.
NFL spokesman Brian McCarthy declined to comment.
Lynch wore a black and charcoal version the next day while reciting, "You know why I'm here" in response to questions. That hat is listed for $40.
New Era is the official supplier for the National Football League and is also making the caps the Super Bowl winners will wear on the field after Sunday's game. The company has made a small number of hats in advance for game day, Domanowski said, some featuring the Seahawks as Super Bowl champs, the others crowning the New England Patriots.
AP Sports Writer John Wawrow contributed to this report.