According to Jonathan Mayo, Jameson Taillon underwent successful Tommy John surgery yesterday.
— Jonathan Mayo (@JonathanMayoB3) April 10, 2014
Over the weekend it was announced that Taillon would undergo surgery. The typical recovery time is a year, which would put Taillon on pace to return at the start of next season. That should put him on track to be in the majors by mid-season 2015.