Right-handed reliever who burst onto the MLB scene in 2010, saving 40 games, making the All-Star team, and winning AL Rookie of the Year honors.
The Atlanta Braves signed him as an amateur free agent in 2005.
He hurt his arm in 2012 and had to undergo Tommy John surgery.
He was born in Azua, Dominican Republic.
All-Star outfielder Josh Hamilton was his teammate on the Texas Rangers from 2010 to 2012.