The Washington Nationals are known to be interested in adding another top-tier starter through free agency. They'd prefer it be a southpaw. C.J. Wilson is under consideration, but will his price tag make the Nationals better fits for Mark Buehrle or even right-hander Roy Oswalt? (AP Photo/Jeff Chiu, File)

Photo by: Jeff Chiu

The Washington Nationals are known to be interested in adding another top-tier starter through free agency. They'd prefer it be a southpaw. C.J. Wilson is under consideration, but will his price tag make the Nationals better fits for Mark Buehrle or even right-hander Roy Oswalt? (AP Photo/Jeff Chiu, File)