The RocketBig names have always dominated baseball, and one of the biggest in recent history is Roger Clemensthe Rocket. As a baseball great, he has shown what it means to succeed, both on the field and off, in his near quarter century of major league service. The Rocket: Baseball Legend Roger Clemens journeys from Clemenss humble and sometimes difficult childhood through his illustrious career in Boston, Toronto, New York, and Houston. Clemens rose through the