Complex sentence: Sanchez was selected 4th overall in the 2009 MLB draft by the Pittsburgh Pirates, and became just the third catcher out of Boston College to be selected in the MLB Draft, and also the highest draft pick in Boston College history.
Split into simpler sentences: Sanchez was selected 4th overall in the 2009 MLB draft. He is just the third catcher out of Boston College to be selected in the MLB Draft, and is the highest draft pick in Boston College history.