Ryan Fitzpatrick entered the 2021 NFL season as the starting quarterback for the Washington Football Team, but on Saturday night he was a member of Bills Mafia.

Fitzpatrick, a 17-year journeyman, spent four seasons in Buffalo and made an appearance at Highmark Stadium and showed support for the Bills in their 47-17 dominating victory over the New England Patriots in the wild-card round of the playoffs.

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Washington Football Team quarterback Ryan Fitzpatrick (14) during pregame warmups prior to the start of the first half go a preseason NFL football game against the Baltimore Ravens, Saturday, Aug. 28, 2021, in Landover, Md. (AP Photo/Nick Wass) (AP Photo/Nick Wass)

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Several images of Fitzpatrick surfaced on social media during the game, but a shirtless photo of Fitzpatrick made its way online on Sunday morning.

Frigid temperatures reached single digits, but the Harvard product blended right in with the rest of the Bills fans in attendance.

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Washington Football Team quarterback Ryan Fitzpatrick (14) hands off the ball to running back Antonio Gibson (24) during the first half of the team's preseason NFL football game against the New England Patriots, Thursday, Aug. 12, 2021, in Foxborough, Mass. (AP Photo/Steven Senne)

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ASHBURN, VA - JUNE 02: Ryan Fitzpatrick #14 of the Washington Football Team throws during the organized team activity at Inova Sports Performance Center on June 2, 2021 in Ashburn, Virginia. (Photo by Scott Taetsch/Getty Images) (Getty Images)

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Over the course of his career, Fitzpatrick played for eight different teams. He didn’t play much this past season because he sustained a hip injury during a Week 1 game against the Los Angeles Chargers, and underwent surgery in December.

Fitzpatrick’s immediate future in the NFL remains uncertain, but he’s a fan favorite in Buffalo for the time being.