Each league's award is voted on by two members of the Baseball Writers Association of America in each league city, which means 28 ballots are cast for the American League winner, and 32 ballots are cast for the National League. Each voter places a vote for first, second, and third place among the pitchers of each league. The formula used to calculate the final scores is a weighted sum of the votes: Score = 5F + 3S + T, where F is the number of first place votes, S is second place votes, and T is third place votes. The pitcher with the highest score in each league wins the award. If two pitchers receive the same number of votes, the award is shared. The current formula started with the season. Prior to that, writers only voted for the best pitcher and used a formula of one point per vote.
The Cy Young Award was first introduced in by Commissioner of Baseball Ford Frick in honor of Hall of Fame pitcher Cy Young, who died in . Frick came up with the idea for an award dedicated solely to pitchers. Originally given to the single best pitcher in the major leagues, the award has seen some changes in format over time. From to , the award was only given to one pitcher in MLB. After Frick retired in 1967, William Eckert became the new Commissioner of Baseball. Due to the fan requests, Eckert announced two awards would now be given out, one for both the American and National Leagues. From 1956 to , no pitcher could win the award more than once. However, that rule was dropped in the baseball season. After a tie vote in , the voting process was changed again. Each writer was to vote for three different pitchers: with their first-place vote receiving five points, the second-place vote receiving three points, and the third-place vote receiving one point (a system which is still used).
The first winner of the award was Don Newcombe, while the most recent winners are Jake Peavy (from the National League) and C.C. Sabathia (from the American League). In , the year after Frick retired as Commissioner, the practice began of honoring one pitcher in each league. In , Warren Spahn became the first left-handed pitcher to win the award. In , Mike Marshall won the award, becoming the first relief-pitcher to win the award. In , Gaylord Perry became the oldest pitcher to receieve the award, only to have the record broken in by Roger Clemens.
| Year | Pitcher | Team | Record | Saves | ERA |
|---|---|---|---|---|---|
| Don Newcombe | Brooklyn Dodgers (NL) | 27-7 | 0 | 3.06 | |
| Warren Spahn | Milwaukee Braves (NL) | 21-11 | 3 | 2.69 | |
| Bob Turley | New York Yankees (AL) | 21-7 | 1 | 2.97 | |
| Early Wynn | Chicago White Sox (AL) | 22–10 | 0 | 3.17 | |
| Vern Law | Pittsburgh Pirates (NL) | 20–9 | 0 | 3.08 | |
| Whitey Ford | New York Yankees (AL) | 25–4 | 0 | 3.21 | |
| Don Drysdale | Los Angeles Dodgers (NL) | 25–9 | 1 | 2.84 | |
| Sandy Koufax | Los Angeles Dodgers (NL) | 25–5 | 0 | 1.88 | |
| Dean Chance | Los Angeles Angels (AL) | 20–9 | 4 | 1.65 | |
| Sandy Koufax | Los Angeles Dodgers (NL) | 26–8 | 2 | 2.04 | |
| Sandy Koufax | Los Angeles Dodgers (NL) | 27–9 | 0 | 1.73 |
| Player | Awards | Years |
|---|---|---|
| Roger Clemens | | 1986, 1987, 1991, 1997, 1998, 2001, 2004 |
| Randy Johnson | | 1995, 1999, 2000, 2001, 2002 |
| Steve Carlton | | 1972, 1977, 1980, 1982 |
| Greg Maddux | | 1992, 1993, 1994, 1995 |
| Sandy Koufax | | 1963, 1965, 1966 |
| Pedro Martínez | | 1997, 1999, 2000 |
| Jim Palmer | | 1973, 1975, 1976 |
| Tom Seaver | | 1969, 1973, 1975 |
| Bob Gibson | | 1968, 1970 |
| Tom Glavine | | 1991, 1998 |
| Denny McLain | | 1968, 1969 |
| Gaylord Perry | | 1972, 1978 |
| Bret Saberhagen | | 1985, 1989 |
| Johan Santana | | 2004, 2006 |