The BIGS

42 Achievements

1,000

35-40h

Xbox 360

American League All-Star

Beat Rookie Challenge (AL)

How to unlock the American League All-Star achievement in The BIGS - Definitive Guide

Tron, SpikedZombies

XboxAchievements

Just pick any national league team and complete entire mode. It is quite long and tedious. You don't have to do well or anything, just finish every event.

Here is a list of teams in the American League:

https://en.wikipedia.org/wiki/American_League#Current_teams