(23, 1950) Bob Feller (22, 1951) Bob Lemon (23, 1954) Co-Leader Early Wynn (23, 1954) Co-Leader Bob Lemon (18, 1955) Co-Leader Jim Perry (18, 1960) Co-Leader Gaylord Perry (24, 1972) Co-Leader Cliff Lee (22, 2008) Shane Bieber (8, 2020) Won–Loss % Ed Klepfer (.778, 1917) Jim Bagby, Sr. (.721, 1920) George Uhle (.711, 1926) Johnny Allen (.938, 1937) Team Record Steve Hargan (.786, 1970) Cliff Lee (.783, 2005) Cliff Lee (.880, 2008) Shane Bieber (.889, 2020) WHIP Addie Joss (.948, 1903) Addie Joss (.806, 1908) Team Record Vean Gregg (1.054, 1911) Stan Coveleski (1.108, 1920) Bob Feller (1.133, 1940) Bob Feller (1.194, 1947) Bob Lemon (1.226, 1948) Early Wynn (1.25, 1950) Mike Garcia (1.125, 1954) Corey Kluber (0.87, 2017) Hits Allowed/9IP Earl Moore (7.12, 1903) Addie Joss (6.42, 1908) Vean Gregg (6.33, 1911) Stan Coveleski (6.09, 1917) Stan Coveleski (8.11, 1920) Bob Feller (7.29, 1938) Bob Feller (6.89, 1939) Bob Feller (6.88, 1940) Allie Reynolds (6.34, 1943) Steve Gromek (7.07, 1944) Early Wynn (6.99, 1950) Bob Lemon (6.86, 1952) Herb Score (5.85, 1956) Herb Score (6.89, 1959) Sam McDowell (5.87, 1965) Sam McDowell (6.02, 1966) Luis Tiant (5.30, 1968) Rick Sutcliffe (7.25, 1982) CC Sabathia (7.44, 2001) Walks/9IP Addie Joss (.83, 1908) Team Record Addie Joss (1.15, 1909) Sherry Smith (1.53, 1924) Sherry Smith (1.82, 1925) Clint Brown (1.71, 1932) Clint Brown (1.65, 1933) Mel Harder (1.66, 1935) Dick Donovan (1.69, 1962) Dick Donovan (1.22, 1963) Ralph Terry (1.25, 1965) Greg Swindell (1.17, 1991) Cliff Lee (1.37, 2008) Strikeouts/9IP Heinie Berger (5.90, 1909) Guy Morton (5.16, 1918) Guy Morton (4.53, 1922) Johnny Allen (6.11, 1936) Bob Feller (7.78, 1938) Bob Feller (7.46, 1939) Bob Feller (7.33, 1940) Bob Feller (6.82, 1941) Allie Reynolds (6.84, 1943) Bob Feller (5.90, 1947) Early Wynn (6.02, 1950) Herb Score (9.70, 1955) Herb Score (9.49, 1956) Herb Score (8.23, 1959) Sam McDowell (9.19, 1964) Sam McDowell (10.71, 1965) Sam McDowell (10.42, 1966) Luis Tiant (9.22, 1967) Sam McDowell (9.47, 1968) Sam McDowell (8.81, 1969) Sam McDowell (8.97, 1970) Len Barker (6.83, 1980) Len Barker (7.41, 1981) Shane Bieber (14.198, 2020) Games Jim Bagby, Sr. (45, 1918) Co-Leader Jim Bagby, Sr. (48, 1920) Johnny Humphries (45, 1938) Bob Feller (43, 1940) Bob Feller (44, 1941) Joe Heving (63, 1944) Bob Feller (48, 1946) Ed Klieman (58, 1947) Ray Narleski (60, 1955) Saves Bill Hoffer (3, 1901) Otto Hess (3, 1906) Co-Leader Ed Klieman (17, 1947) Co-Leader