RENTON, Wash. (AP) Beast Mode is officially in retirement mode.

The Seattle Seahawks have placed running back Marshawn Lynch on the NFL's reserved/retired list, making official what was implied in February when Lynch indicated he was ready to end his football career.

The star running back was placed on the list Thursday. It was a procedural step, but one that needed to be taken to make Lynch's intended retirement official.

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Lynch stole attention from the fourth quarter of the Super Bowl in February when he posted a picture on Twitter with a pair of green football cleats hanging from a telephone or electrical wire. His agent confirmed a day later that Lynch intended to retire.

Seattle made a series of moves this offseason that indicated the running back who led the Seahawks to their first Super Bowl title was ready to step away.

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