Roger Clemens is actually Schmidt's #3 comp in PECOTA. There are some pretty impressive names in the top 20: Jack Morris, Roger Clemens, Bob Gibson, Steve Carlton, Tom Seaver, Curt Schilling, and David Cone. Many (if not all) of those guys pitched several very good seasons after their 33rd birthdays. Of course, there are several guys on Schmidt's comp list that became ineffective after their 33rd birthday. Hideo Nomo was good at 34 (2003) for example, but when he turned 35 (2004), his ERA doubled.