Lions announce Frank Ragnow won't come out of retirement to play this season after failing a physical Ragnow has a Grade 3 hamstring strain that would have prevented him from playing. Content Original Link: https://sports.yahoo.com/nfl/breaking-news/article/lions-announce-frank-ragnow-wont-come-out-of-retirement-to-play-this-season-after-failing-a-physical-161646041.html