Little League World Series Baseball 2010
43 Achievements
PS3
ERA Leader
Got an earned run average of 2.3 or less in a tournament series.
29.0%
How to unlock the ERA Leader achievement in Little League World Series Baseball 2010 - Definitive Guide
This has to be done in a Little League World Series tournament. This is a cumulative trophy, so throughout tournament play try to not allow more than 2 runs against you per game. If you work your pitch selection and location as you did for Dr.K, then you should be able to allow less than 2.3 runs a game as a pitcher.