According to the St. Louis Post-Dispatch, Chris Carpenter is considering retirement and is expected to address his future at a press conference on Tuesday. Carpenter was limited to three regular season starts and three postseason starts last season following surgery for thoracic outlet syndrome, but he said last month that he was feeling good. It's possible that he has encountered a setback since. Losing Carpenter would be a big blow for the Cardinals, but they could turn to some of their young arms or reach out to free agent right-hander Kyle Lohse.