Dan O'Dowd resigned Wednesday as the Colorado Rockies' general manager after a mostly unsuccessful tenure.FILE - In this July 3, 2010, file photo, Colorado Rockies co-owner Dick Monfort, right, confers with general manager Dan O'Dowd as the Rockies warm up before facing the San Francisco Giants in the first inning of a baseball game in Denver. O'Dowd and senior vice president Bill Geivett are leaving the front office after the team turned in a fourth straight losing season. Jeff Bridich is taking over as the new GM.FILE - In this Nov. 30, 2010, file photo, Colorado Rockies general Manager Dan O'Dowd looks on as shortstop Troy Tulowitzki talks to members of the media, in Denver. O'Dowd is resigning after the team turned in a fourth straight losing season. Jeff Bridich is taking over as the new GM.FILE - This is a Feb. 21, 2010, file photo showing Colorado Rockies general manager Dan O'Dowd watching baseball spring training in Tucson, Ariz. O'Dowd and senior vice president Bill Geivett are leaving the front office after the team turned in a fourth straight losing season. Jeff Bridich is taking over as the new GM.FILE - In this June 18, 2010, file photo, Colorado Rockies general...