Complex sentence: The Oakland Athletics selected him in the 31st round of the 2010 Major League Baseball draft, but he opted to enrolled at California State University, Fresno (Fresno State), to play for the Fresno State Bulldogs baseball team in the Mountain West Conference.
Split into simpler sentences: The Oakland Athletics selected him in the 31st round of the 2010 Major League Baseball draft, but he opted to attend college in order to play college baseball. He enrolled at California State University, Fresno (Fresno State), to play for the Fresno State Bulldogs baseball team in the Mountain West Conference.