In the uncertain theater of professional football, the Chicago Bears find themselves confronting a crisis of continuity at the game's most essential position. With franchise quarterback Caleb Williams nursing a hamstring injury and backup Tyson Bagent entering concussion protocol following a brutal sack in Week 2's loss to Minnesota, the Bears may be forced to hand Monday night's primetime stage to Case Keenum — a 14-year journeyman who last started a game three years ago. It is a moment that reveals how quickly the architecture of a season can shift, and how thin the margin is between prepara