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
Season record would be Spud Chandler
Through games played on May 28, 2009 that is Mariano Rivera with a career ERA of 2.29 (287 earned runs in 1043 1/3 innings pitched).
In MLB, that would be Hall of Famer Ed Walsh who pitched with the Chicago White Sox from 1904-1916 and the Boston Braves in 1917. In 2,964 innings, Walsh's ERA was 1.82. Hall of Famer Addie Joss, who pitched for Cleveland from 1902-1910 is second in career ERA. In 2,327 innings, Joss' ERA was 1.89.
.000 Some pitchers only play in one Major League game for their entire life, and go ofer.
Drain is the answer
Roy Holliday Roy Holliday
ubaldo jimenez Colorado rockies
Math teachers.
Mariano Rivera's lowest ERA in a single season was 1.38 in 2005.
That was Bob Gibson, whose 1.12 ERA remains the lowest for any starting pitcher since Dutch Leonard in 1914, and the fourth-lowest of all time, dating back to 1876. In that year Gibson pitched 13 shutouts -- since 1998, no MLB starting pitcher has had 13 complete games!
The optically active lowest alkane is chiral and must have at least one chiral center. The lowest alkane with a chiral center is 2-chloro-2-methylpropane (also known as isobutane), which is optically active due to its non-superimposable mirror image.