Buffalo Bills running back James Cook has agreed to a four-year, $48 million extension with the franchise, which includes $30 million guaranteed, per ESPN's Adam Schefter and multiple reports. Cook attended mandatory mini camp earlier this summer and decided to end his "hold-in" on Tuesday as a full participant in practice this preseason.

James Cook returned to practice on Tuesday. On Wednesday, he agreed to a big-money extension. The Buffalo Bills and Cook agreed to terms on a four-year, $48 million extension, per NFL Network Insiders Ian Rapoport and Tom Pelissero.

By Field Level Media An emotional James Cook put pen to paper Wednesday, signing a contract extension through the 2029 season just one day after the two-time Pro Bowl running back rejoined his Buffalo Bills teammates in the backfield.