Left-handed pitcher known for his deep repertoire that includes a screwball, he made his MLB debut in 2011 for the Chicago White Sox.
He attended Bloomfield Tech High School in New Jersey.
He is known for constantly experimenting with different grips and pitches to add to his arsenal.
He was born in Newark, New Jersey and is of Puerto Rican descent.
Feisty catcher A.J. Pierzynski was his teammate on the White Sox.