IRVING, Texas – The Cowboys will activate guard/center Kevin Kowalski off the physically unable to perform list on Tuesday and will have a three-week window in which to call him up to the active roster or hold him out for the season. “Fortunately being on PUP I’ve been able to sit in the meetings all year long, so I’ve stayed engaged in that aspect of knowing what’s going on and understanding both positions,” Kowalski said. Phil Costa is expected to miss at least three more weeks if not more with a severe ankle injury. With Ryan Cook as the starting center the Cowboys have dressed David Arkin as the backup but he has yet to play a snap. http://espn.go.com/blog/dallas/cowboys/post/_/id/4700648/cowboys-to-call-up-kevin-kowalski wonder what he can do at this point?