O'Brien is batting .307/.348/.566 for Triple-A Reno and hit his 14th home run Friday. This was just the slugger's second home run in June, as he has slumped at the plate recently collecting just nine hits in his last 42 at-bats (.214 average). While Yasmany Tomas is not expected to need a DL stint, after getting hit on the elbow with a pitch Friday, O'Brien's name will be discussed as a replacement any time one of the D-back's corner outfielders suffers an injury. O'Brien has played the outfield exclusively since late May, a sign that his days as a catcher could be over, although that has not been made official.