Jake Peavy of the San Diego Padres (2.54)
In 1914 Dutch Leonard had a 0.96 ERA
Season record would be Spud Chandler
The club record is 1.69 accomplished by Nolan Ryan in the 1981 season.
That was Pedro Martinez of the Boston Red Sox at 2.22.
Duch Leonard with a .96 era.
Mariano Rivera's lowest ERA in a single season was 1.38 in 2005.
Roy Holliday Roy Holliday
ubaldo jimenez Colorado rockies
Entering the 2008 season, that would be Pedro Martinez of the New York Mets with a career ERA of 2.81. Second is Greg Maddux with 3.12 and third is Roy Oswalt at 3.14.
Mariano Rivera
Pedro Martinez of the Boston Red Sox led MLB in ERA in 2003 with 2.22.
Tim Keefe of the 1880 Troy Trojans had a 0.86 ERA in 105 innings and is generally considered as having the lowest ERA in an MLB season as the 1880 season was only 84 games long. Since 1900, the lowest ERA belongs to Dutch Leonard of the 1914 Boston Red Sox at 0.96. He had a 19-5 record and threw 224 2/3 innings.