O'Brien had a huge day Thursday for triple-A Reno, going 3-for-5 with a homerun, three runs scored and three RBI. O'Brien played right field in this one, which may be a hint that the Diamondbacks are ready to give up the idea that he can be a catcher. His ultimate position will determine both his path to the majors and his fantasy value, so it bears watching. What is clear is that the power he showed slugging 34 homeruns across three minor league levels last year plays at any position.