First off, 4.5 is too many to give the browns in this game. But found this from vegasinsider, that the Brows are quitters last game:
Following Thursday night's demoralizing loss to Denver, running back Jamal Lewis accused some unnamed teammates of giving up. Leading by 13 points, the Browns (3-6) allowed three touchdowns in the fourth quarter and lost 34-30, just four days after blowing a 14-point lead in a 37-27 loss to Baltimore.
Lewis was the only player to take his opinion public. But others agreed that the Browns quit.