The Kansas City Chiefs placed running back Isiah Pacheco on injured reserve Wednesday.Pacheco is expected to undergo surgery on his fractured fibula Wednesday, three days after he sustained the injury during Kansas City’s 26-25 victory over the Cincinnati Bengals.The move on Wednesday guarantees Pacheco will sit out at least the next four games.Reports have Pacheco sidelined for 6-8 weeks. However, Chiefs coach Andy Reid told reporters Wednesday that he could not relay a precise timeline for the running back’s expected absence.The Chiefs addressed their backfield on Wednesday by signing Keaontay Ingram to the active roster and fellow running back Kareem Hunt to the practice squad.”We’ll get (Hunt) in there and get him some work. Kind of get him back in the swing of playing and we’ll just see,” Reid said. “We’ve got to get him in a position to where he’s ready to play either this, next week or the following week.”Pacheco, 25, had 90 yards on 19 carries and caught five passes for 21 yards on Sunday. He has a team-high 135 rushing yards through two games.Since being drafted in the seventh round in 2022, Pacheco has won two Super Bowl championships and racked up 2,328 yards from scrimmage with 15 touchdowns in 33 games (26 starts). He has another 635 yards and four TDs from scrimmage in seven playoff starts.Veteran Samaje Perine, 29, is listed as Pacheco’s backup on the depth chart but played sparingly on Sunday. He’s viewed as a third-down back.Undrafted rookie Carson Steele, 21, carried seven times for 24 yards and lost a fumble against Cincinnati.Hunt, 29, was a third-round pick by the Chiefs in the 2017 NFL Draft and spent most of the first two years of his professional career in Kansas City, including a Pro Bowl rookie season in which he posted 1,327 rushing yards to lead the league.