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Peter O'Brien | Catcher

Team: Arizona Diamondbacks
Age / DOB:  (25) / 7/15/1990
Ht / Wt:  6'4' / 235
Bats / Throws: Right / Right

Latest News

Recent News

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. Jun 3 - 8:38 AM

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Player News


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.
May 31 - 5:08 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.
Apr 21 - 2:31 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.
Apr 14 - 8:22 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.
Mar 27 - 8:30 AM

Diamondbacks reassigned C Peter O'Brien, INFs Danny Worth, Nick Evans, Danny Dorn and Jamie Romak and RHPs Jake Barrett and J.C. Ramirez to minor league camp.

O'Brien has far and away the most offensive potential of all the Diamondbacks catching options in camp, there are serious questions about his defensive ability behind the plate though. The 24-year-old slashed .271/.316/.594 with 34 homers and 74 RBI in 106 minor league games at High-A and Double-A in 2014.
Mar 22 - 10:12 PM

Diamondbacks catching prospect Peter O'Brien is struggling with his return throws to pitchers.

According to Nick Piecoro of the Arizona Republic, there were more than a half-dozen return tosses that went wild Sunday in a "B" game. And the same thing happened in a Cactus League game Friday. It sounds like a case of the yips, though O'Brien does not carry a good defensive reputation overall. "I've been working on it," the powerful 24-year-old said Monday. "Getting it under control and making sure I keep the tempo of the game up and keep working from there."
Mar 16 - 11:48 AM

Diamondbacks manager Chip Hale said Saturday of Peter O'Brien that he's "seen nothing that shows he can't be a frontline catcher in the big leagues."

"He's caught, he's blocked, he's received the ball well and he's thrown well," Hale added. Most scouts seem to think O'Brien won't be a long-term catcher, but the D'Backs have been adamant about him staying behind the plate. The 24-year-old is intriguing because of his power and could become the team's catcher sooner rather than later.
Mar 8 - 8:58 AM

Peter O'Brien went 2-for-3 with an RBI single in a win over the Rockies Wednesday.

O'Brien is a highly touted catching prospect, and he got off on the right foot Wednesday. His RBI single in the sixth inning got the Diamondbacks on the board, and he finished with two hits on the day. With the D'backs trading away Miguel Montero over the winter, it's not out of the question that the 24-year-old could break camp with the club. His defense is still a work in progress but O'Brien slammed 34 homers in the minors last season, so his power potential is undeniable.
Mar 4 - 6:21 PM

According to's Steve Gilbert, Peter O'Brien's batting practice sessions have become must-see events for players and executives in Diamondbacks camp.

O'Brien slugged 34 home runs in 106 games last season between High-A and Double-A. There are major questions about his defense behind the plate, but his offensive potential could guide him quickly up the Diamondbacks' shaky catching depth chart. O'Brien was acquired from the Yankees last July in the Martin Prado trade. He appears poised to make his MLB debut at some point in 2015.
Feb 25 - 4:44 PM

Diamondbacks general manager Dave Stewart said Tuesday that the club views prospect Peter O'Brien as their catcher of the future.

Stewart also revealed that he expects O'Brien to reach the majors at some point next season. It's interesting to hear, as the general feeling among scouts is that O'Brien's poor defense wouldn't allow him to stick behind the plate. Apparently the D'Backs are willing to live with some defensive struggles in order to get O'Brien's power into the lineup. The 24-year-old slugged 34 homers between High- and Double-A in 2014, though he hit just .271 with a .316 OBP and 111/21 K/BB ratio.
Tue, Dec 9, 2014 07:47:00 PM

Diamondbacks acquire C Peter O’Brien and either a player to be named later or cash from the Yankees for 3B Martin Prado.

O'Brien, recently named New York's No. 9 prospect by, has blasted an impressive 33 home runs this season on the farm. So why isn't he ranked higher? Firstly, O'Brien's pitch recognition must improve -- he has a ridiculous .555 slugging percentage at Double-A, and a sickly .296 OPS. Will he be able to make consistent contact against the world's best pitchers? He's also is a poor defensive catcher who doesn't have the speed to project into the outfield, meaning first base is his only realistic option if the receiving doesn't improve ASAP.
Thu, Jul 31, 2014 04:56:00 PM

Yankees prospect catcher went 3-for-4 with a double and two home runs for Double-A Trenton on Wednesday.

O'Brien has 33 home runs for the season, and has hit .245/.296/.555 over 72 games with Double-A Trenton. His power is very much real, but he struggles with off-speed pitches and rarely walks. His batting average decreased by nearly 80 points with the move from High-A to Double-A, and it is unlikely that he will have any success in the major leagues without a substantial improvement.
Thu, Jul 31, 2014 10:41:00 AM

Yankees prospect Peter O'Brien went 2-for-3 with two home runs, a walk, and a hit by pitch for Double-A Trenton on Monday.

O'Brien had not hit a home run since June 23, so it was good to see him get back into the swing of things. Despite the power outage, he has hit well as of late, putting up a robust .379/.438/.655 line with one triple and two home runs. O'Brien has been spending most of his time at first base as of late, appearing in a total of 17 games at first base, six games at catcher, and three games at DH over his last 26 games.
Tue, Jul 8, 2014 08:41:00 AM

Yankees catching prospect Peter O'Brien went 2-for-4 with two home runs for Double-A Trenton, raising his season line to .266/.308/.602.

Despite O'Brien's power show, he has struggled in Double-A, hitting .228/.277/.543 with six doubles, 15 home runs, and 41 strikeouts in 173 plate appearances. He is tied for fourth in the Eastern League with 15 home runs, but his high strikeout and low walk totals demonstrate his need for a less aggressive approach.
Tue, Jun 24, 2014 09:21:00 AM

Depth Charts

C1Welington Castillo
2Jarrod Saltalamacchia
3Oscar Hernandez
4Tuffy Gosewisch
1B1Paul Goldschmidt
2B1Chris Owings
2Aaron Hill
3Phil Gosselin
SS1Nick Ahmed
3B1Jake Lamb
2Brandon Drury
LF1David Peralta
CF1A.J. Pollock
RF1Ender Inciarte
2Yasmany Tomas
Starting Pitcher
S1Patrick Corbin
2Rubby De La Rosa
3Jeremy Hellickson
4Robbie Ray
5Chase Anderson
Relief Pitcher
R1Brad Ziegler
2Daniel Hudson
3David Hernandez
4Randall Delgado
5Josh Collmenter
6Matt Reynolds
7AJ Schugel
8Silvino Bracho
9Matt Stites
10Enrique Burgos
11Keith Hessler