Hard-core Clemens.

BaseballSportsProfessional BaseballHouston AstrosSteve CarltonRoger ClemensPittsburgh Pirates
Houston Astros pitcher Roger Clemens reacts to striking his 4,138th career batter, Pittsburgh Pirates' Rob Mackowiak, in the fifth inning Wednesday, May 5, 2004, in Houston. Clemens moved past Hall of Famer Steve Carlton for second place on the career strikeout list with his 4,137th strikeout... ASSOCIATED PRESS
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