Unveiling Baseball’s Untouchable Pitcher: The Secret Behind the Lowest ERA Ever Recorded
Lowest ERA in a Season by a Rookie (All Time)
- 1. Tim Keefe, Troy Trojans (0.86 ERA in 1880)
- 2. Denny Driscoll, Pittsburgh Alleghenys (1.21 ERA in 1882)
- 3. George Bradley, St. Louis Brown Stockings (1.23 ERA in 1876)

Lowest ERA in a Career (All Time)
1. Ed Walsh (1.82 from 1904-17)
(Note: We’re using a minimum of 1,500 innings for our career lists.) Walsh had a 40-win season in 1908 when his Chicago White Sox beat the rival Cubs in the World Series. It was one of only two 40-win seasons that have occurred in the modern era (Jack Chesbro of the Yankees won 41 in 1904). Walsh’s best ERA over a full season was 1.41 in 1909, but he only won 15 games as the White Sox slid to fourth place.



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