O'Brien was optioned to Triple-A Reno prior to Monday's matchup against the Padres. O'Brien's brief stint in the majors didn't quite go as expected, as he hit just .123 despite launching four home runs. He had been held out of the starting lineup for four straight contests, so the Diamondbacks are likely just trying to get the young outfielder more consistent at-bats. Look for him to be back up with the club at some point in the second half of the season.
O'Brien will be held out of the starting lineup for the fourth straight game Sunday against the Giants. O'Brien is typically called upon to face left-handed pitching, so it's not too surprising to see him take a seat yet again Sunday. His bat certainly hasn't done him any favors, as he owns a .509 OPS through 59 plate appearances, despite launching four home runs. Until the young outfielder can show some consistency, Chris Herrmann appears poised to see the majority of starts in left field, as he'll be making his third straight appearance in the starting lineup for Sunday's afternoon contest.
O'Brien is not in the starting lineup for Friday's game against the Giants. With an excellent right-hander toeing the rubber for the Giants (Johnny Cueto), it should come as little surprise that O'Brien is taking a seat for Arizona. Chris Herrmann will get the start in right field, while Yasmany Tomas plays left Friday.
O'Brien is out of the lineup Wednesday against the Phillies. Nobody questions O'Brien's raw power, but he has had a tough time getting to it in games, as big league pitchers have been exploiting the holes in his swing. O'Brien has a .125 average and 18 strikeouts in 40 career at-bats against righties, while hitting four homers with a .261 average in 23 at-bats against southpaws. It would not be surprising if he started sitting more frequently when right-handers are on the mound for the opponent. Brandon Drury will get the start in left field Wednesday and hit seventh.
O'Brien went 0-for-3 with a strikeout in Tuesday's loss to the Phillies, leaving five runners on base in the process. It was another tough night at the plate for the 25-year-old rookie, who is striking out at an alarming 39.3 percent rate. As a power hitter, strikeouts are part of the territory. But if O'Brien can't cut down on his strikeouts a little, he might lose playing time or get sent to Triple-A. He's slashing just .132/.179/.358.