USA Today Sports Marshawn Lynch

Sunday's rather boring, defensive Super Bowl needed a spark. It needed some Beast Mode. And that's what the game got -- maybe for the last time.

During the fourth quarter of the Broncos' 24-10 victory over the Panthers, Marshawn Lynch sent out a tweet that overshadowed most Super Bowl-related social media posts. The picture makes the strong suggestion that Lynch is retiring from the NFL.

Rumors spread earlier in the weekend that Lynch told close friends he would retire. The Seahawks running back is an Oakland native, who bounced around parties and other pre-Super Bowl events for the past week.

Lynch deflected the speculation when one fan asked him directly.

Repost @bleacherreport: Marshawn Lynch had the perfect response when asked if he's coming back next season. (via @TMZ_TV)

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The Seahawks organization, and his teammates, essentially confirmed Lynch's retirement with a series of tweets:

Lynch's mother, Delisa, is supporting her son's decision.

Assuming this is it for Lynch, the 29-year-old retires after nine NFL seasons. Lynch rushed for 9,112 yards and 74 touchdowns in his career.

Lynch joins Calvin Johnson as NFL stars age 30 or younger to announce their retirement in their apparent primes this past week.

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