Detroit has reached an agreement to add running back Isiah Pacheco as a replacement for David Montgomery after the Lions traded Jahmyr Gibbs’ backup before free agency started, a person with knowledge of the deal said Tuesday. Pacheco spent his first four seasons in the running back rotation with the Kansas City Chiefs, who agreed to a $45 million, three-year deal with Super Bowl MVP Kenneth Walker III in the opening hours of free agency.The Green Bay Packers are doing some shuffling at cornerback by adding Benjamin St-Juste while informing Nate Hobbs of a plan to release him a year after signing him to the $48 million, four-year contract, according to two people with knowledge of the decisions. St-Juste is getting a $10.5 million, two-year deal.All the people are speaking to The Associated Press on condition of anonymity because transactions can’t be become official until Wednesday, the first day of the NFL’s new league year.Pacheco rushed for 2,537 yards and 14 touchdowns over four seasons with the Chiefs, helping them win two Super Bowls. Montgomery, who no longer wanted to play behind Gibbs, was sent to the Houston Texans for offensive lineman Juice Scruggs along with fourth- and seventh-round draft picks.The Chiefs also agreed to a $24.5 million, three-year deal with former Baltimore safety Alohi Gilman and an $11 million, two-year contract with receiver Tyquan Thornton, who emerged as perhaps their best deep threat during a 6-11 season that ended a 10-year playoff streak.Gilman fills a big need in Kansas City’s depleted defensive backfield. Safety Bryan Cook is headed to Cincinnati, the Chiefs traded cornerback Trent McDuffie to the Rams and fellow cornerbacks Jaylen Watson and Joshua Williams are signing elsewhere.St-Juste was on the field for about 35% of the Chargers’ …
