The History of Relief Pitching Part Five: the Famous Firemen of October - Cooperstown Cred
MLB Rank 2023: Rating baseball's top 100 players - ESPN
Roger CLEMENS - The King Of K's - Sports Illustrated Vault
Baseball 101: The gems of pitching - Newsday
1956–1980 – SABR's Baseball Cards Research Committee
MLB Rank 2023: Rating baseball's top 100 players - ESPN
Striking Out toward Cooperstown: Roger Clemens sets strikeout record - Sports Illustrated Vault
Collecting – SABR's Baseball Cards Research Committee
The Little Big Book of Baseball by Welcome Books - Issuu
1986 Sports Illustrated
Angels – Tigers: Kody Clemens strikes out Shohei Ohtani with 68 MPH
SEA@BOS: Clemens sets MLB record with 20 strikeouts
SEA@BOS: Clemens sets MLB record with 20 strikeouts
MLB Rank 2023: Rating baseball's top 100 players - ESPN
SEA@BOS: Clemens sets MLB record with 20 strikeouts