http://sportsillustrated.cnn.com/nfl/news/20130115/nfl-playoffs-jim-caldwell-ravens/ Once left for dead, Ravens a threat again thanks to bold Caldwell move 0 inShareJim Caldwell had never called plays at any level before being promoted in December.Patrick Semansky/APEveryone understood it was a bold and risky move to make at such a vital position so late in the season. But that Harbaugh guy clearly knew what he was doing, because it has quickly elevated his team's offensive production to new heights and brought a Super Bowl berth within grasp. No, not Jim Harbaugh with his Colin