Thursday’s matchup between the Las Vegas Raiders and Los Angeles Chargers produced a couple of intriguing storylines. One of them, which some folks may have missed, came in the form of Raiders head coach Jon Gruden wearing a Oakland Raiders hat to start the game.

Gruden himself acknowledged the blunder, which he corrected later in the game by wearing the right hat that displayed his team’s current name, the Las Vegas Raiders. According to Gruden, he was a victim of a prank:

“I apologize for not having the right hat on. Somebody played a pretty good trick on me,” Gruden said, via Michael David Smith of ProFootballTalk.

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The 57-year-old didn’t really detail how the mishap happened, but clearly, he didn’t take the time to really look at the hat he was asked to wear during the game. It’s a good thing the prankster didn’t let him wear a hat with an obnoxious message, as that would have been much more embarrassing for Gruden.

Then again, Gruden did not seem overly concerned with the hat mishap. After all, Thursday’s absolutely bonkers 30-27 overtime loss to L.A. had a significant implication on Vegas’ season. With the Raiders now 7-7, they have virtually lost all hope of making the postseason. More than wearing the wrong hat, Gruden has to be more troubled with how the change in city for the Raiders still resulted in what is already looking like another wasted season for his team.