Many baseball historians consider the formation of the American League in 1901 as the beginning of the modern era. Since that time, no pitcher has won more games in a single season than Jack Chesbro in 1904.
Along with his 41 wins, Chesbro also set and holds the single-season record with 51 games started and 48 complete games.
Nicknamed “Happy Jack” because of his sunny disposition, Chesbro won 196 games in the first 9 years of the 1900s. That’s an average of 21 per season. Twice each he led the league in starts, victories, shutouts, and winning percentage.
Some question Chesbro’s selection to Cooperstown. According to Baseball Reference, only two of the pitchers most similar to him are in the Hall – Chief Bender and Stanley Covelski. The other 8 include guys who aren’t in the Cooperstown conversation like Babe Adams and Carl Mays.
Nonetheless, Chesbro has his plaque.
In the collection is a rare cut signature of the 198-game winner.