There was a reason Buffalo Bills running back James Cook returned to practice Tuesday. Turns out, Cook and the Bills had something in the works behind the scenes, as the 25-year-old running back reportedly inked a four-year, $48 million extension Wednesday, according to multiple reports. Bills, RB James Cook agree to terms on 4-year, $48M extension with $30M guaranteed. (via@TomPelissero,@RapSheet)pic.twitter.com/sKROVo0fON — NFL (@NFL)August 13, 2025 The deal reportedly contains$30 million in guaranteed money, the most given to a running back over the last five seasons, per ESPN's Adam Schefter. Cook was seeking a new deal after rushing for 1,009 yards and scoring a career-high 16 touchdowns last season. This story will be updated.