After learning as a rookie, Jay Cutler enters the 2007 season firmly entrenched as the starting quarterback for a team expected to contend for a Super Bowl berth. Cutler received his baptism by fire in his rookie campaign last season when he went 2-3 as the starter after replacing veteran Jake Plummer in early December. "He is undefeated this year," two-time Super Bowl-winning coach Mike Shanahan said. "He has done a really good job so far and he has worked extremely hard since April and hopefully he could keep it going. Hopefully the learning curve keeps going and he plays well."