The Chiefs and Super Bowl MVP Kenneth Walker have agreed to a three-year deal worth up to $45 million to bring the former Seattle running back to Kansas City, a person familiar with the negotiations told The Associated Press on Monday. Walker fills perhaps the biggest need for the Chiefs as they try to bounce back from a disastrous 6-11 season. Kareem Hunt and Isiah Pacheco, their top two running backs, are both free agents, leaving only second-year pro Brashard Smith under contract.