Klein played his college baseball at the University ofSouthern Maryland. In 2005 the Los Angeles Angels of Anaheim selected Klein inthe 41st round of the MLB draft. In 2009, Klein pitched for the Quebec Capitales of the CanAmLeague and the El Paso Diablos. Klein’s stop in Quebec was brief, recording only 5.1 IP anda 1-0 record. While with EL Paso in 2009, Klein finished the season with41.0 IP, a 4-6 record, a 5.05 ERA, and 29 SO.