With the retirement of veteran defensive end Chris Kelsay on Wednesday, the Buffalo Bills are near the end of their pre-free agency roster purge before it begins on March 12. In all, they have cut three players, told two restricted free agents they won't be tendered and re-signed a pair of soon-to-be free agents in addition to saying goodbye to Kelsay. Buffalo entered the off-season with about $9.3 million in free cap space before rolling over $9.8 million from their 2012 cap. The combined $19.1 million might have been enough for the Bills to re-sign key free agents Jairus Byrd and Andy Levitre, but would have hindered their ability to add other free agents to the squad.