O'Brien will move to the outfield full-time, according to a report from Steve Gilbert of MLB.com. The timing of the decision seems curious with the injury to starting catcher Tuffy Gosewisch, but O'Brien has been considered a candidate to move out from behind the plate for most of his minor league tenure. He is hitting .337/.377/.641 for Triple-A Reno and will now focus on developing as an outfielder where his path to the majors is less straight forward since the D-Backs have a number of decent options ahead of him.