Former Dolphins linebacker Channing Crowder has decided to retire from football at age 27. Crowder, who was cut by Miami less than two weeks ago, made the announcement on WQAM radio, where he has been a talk-show host. "I know I can still play football," he said. "But I decided to hang it up. Now I'm not worried about icing my knees anymore or getting stingers or concussions. I did it long enough. I played football since I was 9 years old." That included six NFL seasons, all in Miami. "I'm not making a comeback," he said. "If somebody tells me I don't have to go through training camp and I can come in Week 1 and play -- but I don't see it."