IRVING — Anthony Spencer will be on 53-man roster despite not being ready for the start of the season.The Dallas Cowboys could have as many as five defensive linemen on their 53-man roster who won't be healthy enough to play in Week 1, owner and general manager Jerry Jones said on his KRLD radio show Tuesday morning. One of those five will be defensive end Anthony Spencer, who is on the physically unable to perform (PUP) list. Spencer continues to make progress after undergoing microfracture surgery on his left knee in October and could be an option as early as Week 2. "He's progressed at a surprisingly fast pace," Jones said. "I would say not Week 1, but there’s a possibility that any time after that he could feel good enough about his repairs. It’s a question of him feeling good about his cuts. He’s in great shape. We certainly know that he could give us a lift earlier than we had planned.”If Spencer remained on the PUP list past Saturday, he would not be eligible to return until Week 7.