INNINGS PITCHED

I KNOW I SHOULD KNOW BUT HOW DOES A PITCHER , CLEMENS, IN 2006 (REALLY 2005) PITCH 330 INNINGS WITHOUT HIS ARM FALLING OFF WHEN HE ONL :roll: Y PITCHED 211 INNINGS?
http://forum-365.strat-o-matic.com/archivesn/
http://forum-365.strat-o-matic.com/archivesn/viewtopic.php?f=12&t=235880