EL SEGUNDO — Chris O’Leary’s feet were firmly planted in Kalamazoo, Michigan, for the 2025 season, after leaving the Chargers and taking the job as the defensive coordinator at Western Michigan. His head and his heart were there, too, but there was something about Southern California that called out to him. So, on every Wednesday last season, when his work with the Broncos was done, he would review the video of the Chargers’ latest game, preparing the highlights to be shown to his players at Western Michigan. He would tag specific plays, alter the terminology slightly and show them to his players. O’Leary would then deliver a short message. “Watch the guys at the highest level do it,” he...