1B/OF Peter O'Brien was claimed off waivers by the Rangers on Saturday after the Reds designated him for assignment Thursday. O'Brien, who appeared in 28 games for the Diamondbacks last season, played in just five games for the Reds' Triple-A affiliate in Louisville.

1B/OF Peter O'Brien was designated for assignment. O'Brien, claimed off waivers by the Reds from Kansas City on May 16, was 4-for-20 with one home run and two RBIs at Triple-A Louisville.

1B Peter O'Brien was claimed off waivers from the Kansas City Royals and optioned to Triple-A Louisville. O'Brien has been designated for assignment by the Royals on Wednesday. In 27 games for Triple-A Omaha this year, he hit .162/.235/.276 with three homers and six RBIs. He had brief stints in the majors with Arizona in 2015 and 2016.

OF Peter O'Brien was designated for assignment by the Royals on Wednesday. In 27 games for Triple-A Omaha this year, he hit .162/.235/.276 with three homers and six RBIs. He had brief stints in the majors with Arizona in 2015 and 2016.

OF Peter O'Brien broke up Giants RHP Johnny Cuetos no-hitter with a pinch-homer in the third inning on Saturday. O'Brien, recently recalled from Triple-A Reno for this third stint with the Diamondbacks, is 8-for-58 (.138) in the majors this season, and five of those hits have been homers.

LF/1B Peter O'Brien was recalled from Triple-A Reno on Tuesday. O'Brien is batting .123 with four home runs and eight RBIs in 67 at-bats with the Diamondbacks this season. He batted .254 with 24 homers and 75 RBIs for Reno.

LF/1B Peter O'Brien was recalled from Triple-A Reno.

OF Peter O'Brien was optioned to Triple-A Reno when SS Nick Ahmed came off the paternity list Monday. O'Brien hit four home runs but had a .123/.167/.500 batting line and was held out of the starting lineup the past four days.

OF Peter O'Brien struck out three times and was 1-for-4 in the 5-2 loss to the Toronto Blue Jays on Wednesday. He has struck out 16 times in his past 36 plate appearances. The D-backs whiffed 26 times in splitting the two-game series in Toronto. 'It's not concerning at all to me, it does show that I need to make an adjustment, and I am working on that, so I'll be fine," O'Brien said.

LF Peter O'Brien homered twice in Friday's victory over the Phillies, a three-run shot in the fourth inning off Philadelphia starter Adam Morgan and a solo blast in the seventh off reliever Elvis Araujo. O'Brien, a rookie, is 3-for-20 in six games this season. All three hits are home runs. "Let's mix in some singles, huh?" he said with a smile. He said he has been able to remain positive, despite his early struggles. "I think the biggest thing is just kind of getting comfortable," he said. "That's what I've been saying since I got here -- new ballparks, new arms I haven't seen, so I talk to a lot of guys. I think the biggest thing is just kind of be in the moment and get comfortable and everything will start coming around."

BALTIMORE -- Michael Saunders set career highs with three homers and eight RBIs, and the Toronto Blue Jays clubbed the Baltimore Orioles 13-3 in the opener of a three-game series on Friday night.Justin Smoak had a two-run homer and Josh Donaldson added a solo shot and a two-run triple for the Blue Jays, who won their fourth straight to pull within one game of the American League-East leading Orioles.Saunders hit three-run shots in the first and fourth innings and added a two-run homer, his 15th home run of the season, in the sixth.Toronto's explosion came minus Jose Bautista, who was placed on the 15-day disabled list with a sprained left big toe suffered Thursday in Philadelphia.Giants 5, Rays 1ST. PETERSBURG, Fla. -- Jeff Samardzija was an out away from a three-hit shutout as San Francisco cruised to its sixth straight win.Samardzija was dominant -- he gave up two singles in the second inning, then faced the minimum for the next six-plus innings.With two outs in the ninth, Rays shortstop... [More]

LF Peter O'Brien is in his second season as a full-time outfielder, and the D-backs are pleased with his progress there. O'Brien leaped at the wall to take an extra-base hit, possibly a home run, away from Dodgers 3B Justin Turner in the fifth inning of Arizona's 3-2 victory Monday. "Anything he's going to have to use a lot of foot speed on is not going to be something he's going to be able to do," Arizona manager Chip Hale said. "But the positioning that Dave (McKay, first base/outfield coach) tries to give him ... the jumps he is getting is much better than we saw in spring training. He just looks a lot more sure of himself."

LF Peter O'Brien made his first homer of the season count, lining a ball 424 feet into the second deck of seats down the left-field line for a three-run homer to cap a four-run first inning. "Just trying to a pitch I could put a good swing on," O'Brien said. "It's definitely nice to get the first one out of the way. Just keep getting comfortable and keep trying to have good at-bats." O'Brien hit his first homer of the season in his second start after being recalled Friday from Triple-A Reno, where he was hitting .330 with affiliated minor leagues highs with 17 homers and 142 total bases. "I feel like I'm starting to get settled in, and the routine feels a little bit better," O'Brien said. D-backs manager Chip Hale said O'Brien will get regular playing time in left field moving forward.

LF Peter O'Brien did not play Saturday, a day after going 0-for-4 with three strikeouts against Miami in his first start after being recalled from Triple-A Reno on Friday. The Diamondbacks chalked it up to a case of wanting to do too much, especially inasmuch as O'Brien is from the Miami area. "It's his hometown team," Arizona manager Chip Hale said. "He wants to make a big impression. Everything you do to try to calm him down, you almost have to let him go out there, struggle a little bit that first day, swing and miss, and get over it and come back to the earth and be who you are."

LF Peter O'Brien was 0-for-4 with three strikeouts after being recalled from Triple-A Reno earlier Friday, and he will get regular time in the near future. "He's going to play," Arizona manager Chip Hale said. "He's going to play left field. He's going to play close to every day, five out of six, five out of seven. Going to give him an opportunity. He's earned it. We want to see what he can do." O'Brien, 25, was slashing .330/.356/.670 with 17 homers and 52 RBIs in 51 games at Reno. He led the affiliated minors in homers and total bases (142). "He needs to get a good sample size to see what he can do," Hale said. "Is that a month? We'll see."

OF Peter O'Brien was optioned to Triple-A Reno after Sunday's game to make room on the roster for LHP Edwin Escobar, who will be added to the roster for a Monday start against Houston. O'Brien struck out as a pinch-hitter Friday, the day he was recalled. He is slashing .306/.330/.601 with 12 homers and 32 RBIs in 42 games for Reno.

OF Peter O'Brien struck out as a pinch-hitter after being recalled from Triple-A Reno on Friday, his first promotion this season. O'Brien is slashing .306/.330/.601 with 12 homers and 32 RBIs in 42 games for Reno, and he was recalled just before the D-backs are scheduled to play their first two games requiring a DH, Wednesday and Thursday at Houston. The D-backs also play DH games at Toronto on June 21-22.

OF Peter O'Brien was named Arizona's Minor League Player of the Month for April after hitting .370 with seven homers and 21 RBIs. O'Brien, who was a catcher at the University of Miami, was also named the Player of the Week for the Triple-A Pacific Coast League. In O'Brien, the Diamondbacks know they have a gifted hitter who is just about ready to get promoted to the majors. Defense is not really O'Brien's thing. But if he can continue to produce as he always has offensively, they will him a spot.

OF Peter O'Brien is 8-for-19 during a five-game hitting streak with Triple-A Reno, with two doubles, four homers and nine RBIs. He had all three homers and eight RBIs in the final three games of a series against Fresno before the Aces' off day Wednesday. O'Brien is slashing .343/.342/.700 with seven homers and 17 RBIs in the first 17 games. He is tied with Texas prospect Joey Gallo and Seattle prospect Mike Zunino for the Pacific Coast League lead in homers.

O'Brien will enter spring training next season as a catcher, Steve Gilbert of MLB.com reports.

O'Brien came up as a catcher, but made all three of his big league appearances this season in left field. With Jarrod Saltalamacchia and Welington Castillo both potentially hitting the free agent market, the Diamondbacks will enter the offseason with some uncertainty behind the plate, but O'Brien will have the opportunity to win the job.