Today Kyle Shanahan threw a little bit of gasoline on the Peyton Manning to the Redskins fire that has been burning for the last few weeks.Appearing on ESPN 980, the Redskins offensive coordinator said Mannings age would not be a concern if he does attempt to come back from a neck injury that sidelined him for all of the 2010 season."I know he's up there in age, but if he's healthy, age is not an issue," said Shanahan. "That guy takes care of his body.Manning will turn 36 in March. The Colts will need to decide if they are going to pay him a 28 million option bonus in early March or release him.The neck injury, which has required three surgical procedures in 19 months, is, of course, of concern to Shanahan. But if Manning gets a clean bill of health on that, Kyle thinks hell be fine. "If he can recover," Shanahan continued, "and the doctors say he's healthy, and he says he's healthy, then that's enough for me."