10. Roger Clemens
Teams: Boston Red Sox, Toronto Blue Jays, New York Yankees and Houston Astros
Innings Pitched: 4,916.2
This list starts with a player who would be ranked higher if not for steroid allegations. Clemens was one of the most feared and dominant pitchers of all-time. With a fastball in the upper 90’s and a hard slider, Clemens struck out 4,672 batters while winning 354 games. The 7-time Cy Young winner was an 11-time All-Star, MVP, and 2-time World Series Champion. At the peak of his career, Clemens was a 4-time MLB wins leader, 7-time ERA champion, 5-time AL strikeout leader, and won the pitching Triple Crown twice.
Clemens once struck out 20 batters in nine innings while with the Red Sox, a record that has since been matched only three times. A player known for his fire, Clemens demonstrated the passion that helped make him into one of the best ever when Hank Aaron questioned him winning the MVP: “I wish he [Aaron] were still playing. I’d probably crack his head open to show him how valuable I was.”