With the unfortunate news that Chris Carpenter's thoracic outlet syndrome will likely keep him from throwing a pitch in 2013, the St. Louis Cardinals find themselves attempting to fill a Carpenter-sized hole in the starting rotation for the second straight season. Since the news broke last week, the excellence with which Carpenter pitched while wearing the birds on the bat has been well-chornicled. There is no question losing Carpenter hurts the Redbirds. I thought we might use the publicly-available projections for Carpenter and his potential replacements to attempt to get an idea of how much.