Sandy Koufax (27 wins)
Jack Chesbra
BiG Ed Walsh ~ Chicago White Sox ~ 41 games
Through the 2008 season, that is Mordecai 'Three Finger' Brown who won 29 games in the 1908 season.
Through the 2008 season, that is Paul Quantrill who pitched in 86 games in the 2004 season.
The Pirates franchise record for most wins by a pitcher in a season is held by Frank Killen who won 34 games in 1893.
Jim Bagby won 31 games for the Indians in 1920.
Mike Mussina was the last Yankees pitcher to win 20 games in a season. In 2008, Mike Mussina's record was 20-9.
Denny McLain, who won 16 straight road games in 1968.
Denny McLain of the 1968 Detroit Tigers with 31 wins.
Old Hoss Radbourn way back in 1884 won an amazing 59 games according to Baseball Almanac.
dave stewart
Yes.The most wins a pitcher in MLB has had in a season without a loss is 12. That was by Tom Zachary of the 1929 New York Yankees who pitched in 26 games and threw 119 2/3 innings.