Twins Call Up Centeno, Mastroianni; Murphy Sent Down, Graham DFA'd

A flurry of activity in the wake of the Twins releasing Casey Fein and Tommy Milone on Thursday.  Here's what we know as of 1:00 Central Daylight Time.

• John Ryan Murphy sent down.  As you may know, the Twins traded the very decent Aaron Hicks for him.  Although Hicks has struggled for the Yankees, Murphy has entered a dimension beyond struggling into something almost tangibly upsetting, like an abandoned pile of baby dolls in a denuded forest.
• J.R. Graham DFA'd.  You may remember Graham from being on the team all last year.  He's not on the team anymore.
• Juan Centeno called up.  Your new back-up catcher has a career OPS of .688 at AAA.  That's all I know about Juan Centeno beyond that he played for the Brewers last year.
• Darin Mastroianni called up.  Veteran leadership something something.