Letting Pacheco go was difficult because of everything he meant to the team in its back-to-back Super Bowl wins. Letting a player of his track record walk is not an easy decision, but his injury shows why the Chiefs were right to have parted ways when they did. Isiah Pacheco's injury already proves Chiefs right for letting him goDetroit Lions running back Isiah Pacheco | IMAGN IMAGES via Reuters ConnectPacheco suffered an MCL sprain, knocking him out for some time. Walker should greatly elevate this Chiefs' offense and take pressure off Patrick Mahomes in ways Pacheco just could not anymore. This new-look Chiefs running back room complements itself well, and should thrive if it can stay healthy.