Marshawn Lynch tweets photo of hanging cleats

For the first time in three years, Seattle Seahawks running back Marshawn Lynch did not play in the Super Bowl.

And he may have made his retirement announcement during Sunday's Super Bowl 50 between the Denver Broncos and Carolina Panthers.

If Lynch is indeed signaling that he's hanging up his cleats, it should come as no surprise that he did so without words. ESPN's Adam Schefter reported earlier Sunday that Lynch has been telling friends he plans to retire. And during an interview with 710 ESPN Seattle earlier this offseason, general manager John Schneider said he believed Lynch was leaning that way.

Seahawks cornerback Richard Sherman was one of Lynch's teammates who took his tweet as an announcement that the running back is finished.

This past season was a struggle for Lynch. He missed nine regular-season games and one more in the playoffs after undergoing surgery associated with a sports abdomen injury on Nov. 25. The previous four seasons, Lynch had missed just one game.

He turns 30 this offseason and reportedly considered retirement last year after dealing with back issues.

In his nine-year career, Lynch has started 114 games, carrying 2,144 times for 9,112 yards and 74 touchdowns (4.3 YPC).