Lynch is entering his fifth season with the Seahawks. He was traded to Seattle by the Buffalo Bills in October 2010.
Led by Lynch (1,257 yards), the Seahawks had the fourth-most rushing yards in the NFL last season.
The 28-year-old running back was rumored this offseason to be considering retirement.
Lynch will hold out while he seeks to negotiate a new contract. In 2012, he signed a four-year, $30 million deal that was set to pay him $5.5 million this season. For each day of his holdout, Lynch could be fined $30,000.
- Dan Gartland