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Peter O'Brien | Outfielder | #14

Team: Arizona Diamondbacks
Age / DOB:  (25) / 7/15/1990
Ht / Wt:  6'4" / 235
Bats / Throws: Right / Right
College: Miami (FL)
Drafted: 2012 / Rd. 2 (0) / NYY
Contract: view contract details

Latest News

Recent News

Diamondbacks optioned OF Peter O'Brien to Triple-A Reno.
Enrique Burgos and Evan Marshall will join him in the minors. O'Brien found his power stroke this spring with five homers in 60 at-bats. He's headed back to Reno where he completely dominated last year (.284, 26 HR, 107 RBI). Apr 2 - 9:28 PM

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Player News


Peter O'Brien cranked his second and third home runs of the spring Sunday in the Diamondbacks' 11-4 Cactus League rout of the White Sox.

Arizona jumped all over White Sox starter John Danks, with O'Brien delivering a three-run shot in the second inning and a two-run bomb in the third. The big 25-year-old got the start at first base in this one. He has also been playing some corner outfield. If injuries create an opportunity for O'Brien at some point in 2016, he'll be worth grabbing in standard mixed fantasy leagues. The former catcher had an .883 OPS, 26 home runs and 107 RBI in 131 games last year at Triple-A Reno.
Mar 13 - 7:14 PM

Peter O'Brien singled in his only at-bat Tuesday against the University of Arizona Wildcats.

He played two innings of left field before getting yanked in the top of the third along with most of the other big-name Diamondbacks. O'Brien has expressed a desire to get more playing time behind the plate this spring and summer, but the decision-makers in Arizona seem content on turning him into a corner outfielder. The young slugger tallied 26 home runs and 107 RBI in 131 games last season at Triple-A Reno. If injuries move him into a starting role at some point in 2016, he'll carry significant fantasy intrigue.
Mar 1 - 8:04 PM

Diamondbacks manager Chip Hale said Peter O'Brien will play some catcher but will mostly be used as an outfielder during spring training.

O'Brien was hoping to move back behind the plate full time this season but the D'Backs' coaching staff seems to have other ideas. He'll be hard pressed for playing time in the outfield behind starters David Peralta, A.J. Pollock and Yasmany Tomas. O'Brien batted .284 with 26 HR and 107 RBI over 490 at-bats in the minor leagues last season.
Feb 17 - 3:34 PM

Peter O'Brien will enter spring training next year as a catcher.

O'Brien expressed a desire to move back behind the plate after spending the 2015 season trying out corner outfield. The 25-year-old has a big bat, but he was never a very good defensive backstop and how he fits into the Diamondbacks' future plans is currently unclear. Welington Castillo should open the 2016 season as Arizona's starting catcher.
Mon, Oct 5, 2015 02:17:00 PM

Peter O'Brien homered off Dallas Keuchel in his lone at-bat off the bench Friday against the Astros.

It seems crazy that the Diamondbacks haven't given O'Brien a single start since his callup on Sept. 8, but it likely has a lot to do with his unsettled position situation. The team is again looking at making him a full-time catcher, even though he's never going to be very good back there. His bat remains intriguing. He's had just seven plate appearances since his callup, but he's 3-for-5 with two walks. It seems like the Diamondbacks really blew it by not giving him some starts in left.
Sat, Oct 3, 2015 01:29:00 AM

Peter O'Brien has told the Diamondbacks that he wants to return to the catcher position.

O'Brien had the yips when trying to throw the ball back to the pitcher earlier this season and eventually moved to the outfield. He doesn't think it will be an issue anymore, though, and he and the D'Backs would both like him to take another crack at things behind the plate. O'Brien would certainly make for a much more interesting prospect if he can stick at catcher.
Tue, Sep 29, 2015 07:57:00 PM

The Diamondbacks would like Peter O'Brien to return to the catcher position next season.

O'Brien developed the yips when trying to throw the ball back to the pitcher earlier this season and eventually asked for and was granted the opportunity to move to the outfield full-time. However, it appears the D'Backs still want to develop him as a catcher. It's certainly understandable, as his bat would carry a lot more value behind the plate. That said, Arizona won't force a move, as manager Chip Hale said O'Brien's choice of position is "up to him." O'Brien batted .284/.332/.551 with 26 home runs and 107 RBI at Triple-A Reno this season.
Sun, Sep 20, 2015 08:42:00 AM

Making his second career appearance as a pinch-hitter, Peter O'Brien singled in a run in his lone at-bat Saturday.

It's the same thing he did Friday, so he's 2-for-2 to start his career. Ideally, the Diamondbacks would get him some starts in the outfield down the stretch. However, it's going to be tough to accomplish with David Peralta, Yasmany Tomas and Ender Inciarte currently occupying the corners.
Sun, Sep 13, 2015 01:28:00 AM

Diamondbacks purchased the contract OF Peter O'Brien from Triple-A Reno.

O'Brien, who is strictly an outfielder at this point, batted .284/.332/.551 with 26 home runs and 107 RBI over 131 games this season in Triple-A. The power is intriguing, but his approach is a work in progress. It's unclear how much he'll play down the stretch, but it should be a fun sneak preview for D-Backs fans.
Tue, Sep 8, 2015 04:31:00 PM

Diamondbacks general manager Dave Stewart said Monday that a decision has not been made as to whether prospect Peter O'Brien has given up catching and become a full-time outfielder.

The Triple-A Reno Aces' official Twitter account tweeted Sunday that O'Brien had "made the decision" to give up catching and it was later confirmed by the D'Backs. The tweet has since been deleted and now Stewart is saying nothing is final yet. "We're never going to let a player dictate to us what he wants to do," Stewart said. "We'll sit down and, as a group, discuss and talk about what we should be doing and what the best direction is for a player." O'Brien's throwing from the catcher position has returned to normal after he had the yips in spring training. Still, it sure seems like his future is in the outfield even if the decision isn't official yet. He's batting .339/.377/.634 with 12 homers and 47 RBI over 49 games for Reno this season.
Wed, Jun 3, 2015 08:38:00 AM

The Diamondbacks confirmed Sunday that prospect Peter O'Brien has switched to the outfield full-time.

Given the D'Backs injury woes behind the plate, and the fact that O'Brien had been making strides defensively, it's a surprising development. The 24-year-old is currently hitting .341/.382/.653 with 12 homers and 46 RBI over 46 games at Triple-A Reno.
Sun, May 31, 2015 05:08:00 PM

Diamondbacks prospect C/OF Peter O’Brien went 3-for-4 with a home run and double on Monday for Triple-A Reno.

The home run and double were his fourth and fifth of the season, respectively, and he also plated two in the game. He’s batting .404/.429/.766 (.429 BABIP) with 14 RBI and nine strikeouts (but no walks) through 49 plate appearances. O’Brien, 24, entered spring training high on Arizona’s depth chart behind the plate, but he was plagued by a case of yips when throwing the ball back to the pitcher and has since moved to the outfield. He’s seen time at both corner outfield positions at Triple-A Reno (more in left field, though) and, unsurprisingly, is already putting up big power numbers in the hitter-friendly Pacific Coast League.
Tue, Apr 21, 2015 02:31:00 PM

Diamondbacks manager Chip Hale said Tuesday that prospect Peter O'Brien will continue to play the outfield at Triple-A Reno for the next month or so.

The plan is to then give him some work at catcher. O'Brien was moved out from behind the plate after having issues during spring training throwing the ball back to the pitcher. It hasn't affected his offense, as he's batting .391/.417/.609 with a home run over his first five games for Reno.
Tue, Apr 14, 2015 08:22:00 PM

Diamondbacks catching prospect Peter O'Brien played the outfield in a minor league game for the second straight day Thursday.

O'Brien has had major issues this month in throwing the ball back to the pitcher, so the Diamondbacks are going to keep him away from the catcher position for the time being. "I think he's going to play some outfield (once the minor league season starts) and catching isn't out of the question, but we're still talking internally to figure out what's best for him," farm director Mike Bell said. The D'Backs were reluctant over the winter to pursue an upgrade at catcher mainly because they believed O'Brien would be ready to take over at the position in short order. Obviously, they didn't envision the 24-year-old developing a case of the yips. O'Brien was re-assigned to minor league camp earlier this week.
Fri, Mar 27, 2015 08:30:00 AM

Depth Charts

C1Welington Castillo
2Chris Herrmann
1B1Paul Goldschmidt
2B1Jean Segura
2Phil Gosselin
SS1Nick Ahmed
3B1Jake Lamb
2Brandon Drury
LF1Yasmany Tomas
2Rickie Weeks
CF1Chris Owings
2A.J. Pollock
RF1David Peralta
Starting Pitcher
S1Zack Greinke
2Shelby Miller
3Patrick Corbin
4Rubby De La Rosa
5Robbie Ray
Relief Pitcher
R1Brad Ziegler
2Tyler Clippard
3Daniel Hudson
4Randall Delgado
5Andrew Chafin
6Josh Collmenter
7Enrique Burgos
8Keith Hessler
9Jake Barrett