Peter O'Brien
Peter O'Brien
29-Year-Old First Baseman1B
Miami Marlins
2019 Fantasy Outlook
O’Brien saw big-league action in September for the first time since 2016, and he played generally well over his 22-game stint. He flashed the impressive power that has long made speculators dream, hitting four homers with a .530 slugging percentage in 74 plate appearances. Strikeouts remained an issue (22 Ks, 35.3 K% for his career), but he at least put himself in position to contend for a roster spot in 2019. O’Brien is past prospect stage at this point and the swing and miss may be too great for him to overcome, but the Marlins aren't exactly stacked with first-base options, so it's not out of the question that O'Brien could break camp with a fairly steady role. Read Past Outlooks
RANKSFrom Preseason
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$Signed a minor-league contract with the Dodgers in January of 2018. Traded to the Marlins in June of 2018.
Back in action with New Orleans
1BMiami Marlins  AAA
June 26, 2019
O'Brien (ribs) went 0-for-3 with a walk and a strikeout in his first game back with Triple-A New Orleans on Tuesday.
ANALYSIS
A rib injury put O'Brien on the major-league injured list in May and the Marlins ultimately decided he was not worth waiting around for; they designated him for assignment June 20 to make room for Zac Gallen. The 28-year-old O'Brien cleared waivers and has since been cleared to return to active competition with New Orleans, where he is likely to play out the remainder of the campaign, with an outside shot at a September callup.
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Batting Stats
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Batting Order Slot Breakdown
vs Right-Handed Pitchers
vs RHP
#1
#2
#3
#4
#5
#6
#7
#8
#9
1
4
4
vs Left-Handed Pitchers
vs LHP
#1
#2
#3
#4
#5
#6
#7
#8
#9
2
2
Left/Right Batting Splits
Since 2017
 
 
+36%
OPS vs RHP
2019
 
 
+437%
OPS vs RHP
2018
 
 
+34%
OPS vs LHP
2017
No Stats
OPS PA R HR RBI SB AVG OBP SLG
Since 2017vs Left .575 29 2 1 1 0 .185 .241 .333
Since 2017vs Right .783 92 8 4 13 1 .247 .326 .457
2019vs Left .133 15 0 0 0 0 .067 .067 .067
2019vs Right .714 32 2 1 4 1 .222 .344 .370
2018vs Left 1.095 14 2 1 1 0 .333 .429 .667
2018vs Right .817 60 6 3 9 0 .259 .317 .500
2017vs Left 0 0 0 0 0 0 0 0 0
2017vs Right 0 0 0 0 0 0 0 0 0
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Home/Away Batting Splits
Since 2017
 
 
+17%
OPS on Road
2019
 
 
+21%
OPS on Road
2018
 
 
+10%
OPS on Road
2017
No Stats
OPS PA R HR RBI SB AVG OBP SLG
Since 2017Home .661 43 1 1 5 0 .231 .302 .359
Since 2017Away .771 78 9 4 9 1 .232 .308 .464
2019Home .458 18 0 0 3 0 .176 .222 .235
2019Away .556 29 2 1 1 1 .160 .276 .280
2018Home .815 25 1 1 2 0 .273 .360 .455
2018Away .895 49 7 3 8 0 .273 .327 .568
2017Home 0 0 0 0 0 0 0 0 0
2017Away 0 0 0 0 0 0 0 0 0
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Stat Review
How does Peter O'Brien compare to other hitters?
This section compares his stats with all batting seasons from the previous three seasons (minimum 400 plate appearances)*. The bar represents the player's percentile rank. For example, if the bar is halfway across, then the player falls into the 50th percentile for that stat and it would be considered average.

* Exit Velocity and Barrels/PA % are benchmarked against this season's data (min 200 PA) and Hard Hit Rate is benchmarked against last season's data (min 400 PA). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
  • BB/K
    Walk to strikeout ratio
  • BB Rate
    The percentage of plate appearances resulting in a walk.
  • K Rate
    The percentage of plate appearances resulting in a strikeout.
  • BABIP
    Batting average on balls in play. Measures how many of a batter’s balls in play go for hits.
  • ISO
    Isolated Power. Slugging percentage minus batting average. A computation used to measure a batter's raw power.
  • AVG
    Batting average. Hits divided by at bats.
  • OBP
    On Base Percentage. A measure of how often a batters reaches base. Roughly equal to number of times on base divided by plate appearances.
  • SLG
    Slugging Percentage. A measure of the batting productivity of a hitter. It is calculated as total bases divided by at bats.
  • OPS
    On base plus slugging. THe sum of a batter's on-base percentage and slugging percentage.
  • wOBA
    Weighted on-base average. Measures a player's overall offensive contributions per plate appearance. wOBA combines all the different aspects of hitting into one metric, weighting each of them in proportion to their actual run value.
  • Exit Velocity
    The speed of the baseball as it comes off the bat, immediately after a batter makes contact.
  • Hard Hit Rate
    A measure of contact quality from Sports Info Solutions. This stat explains what percentage of batted balls were hit hard vs. medium or soft.
  • Barrels/PA
    The percentage of plate appearances where a batter had a batted ball classified as a Barrel. A Barrel is a batted ball with similar exit velocity and launch angle to past ones that led to a minimum .500 batting average and 1.500 slugging percentage.
BB/K
0.21
 
BB Rate
8.5%
 
K Rate
40.4%
 
BABIP
.273
 
ISO
.095
 
AVG
.167
 
OBP
.255
 
SLG
.262
 
OPS
.517
 
wOBA
.240
 
Exit Velocity
92.0 mph
 
Hard Hit Rate
30.4%
 
Barrels/PA
2.1%
 
Advanced Batting Stats
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Additional Stats
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Defensive Stats
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Stats Vs Upcoming Pitchers
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Recent RotoWire Articles Featuring Peter O'Brien
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147 days ago
Jan Levine kicks off the 2019 NL FAAB festivities with a thorough look at possible options, including an intriguing battle for bullpen supremacy in Arizona.
Past Fantasy Outlooks
2017
2016
2015
O'Brien flashed some power at the MLB level last season, but outside of the home runs, it was a disappointing season for the converted catcher. O'Brien posted a dismal .141/.179/.391 slash line in 64 at-bats and struck out a whopping 40.3 percent of the time. Five of his nine hits left the yard, but MLB pitchers were able to completely baffle O'Brien for the most part. Arizona decided he couldn't cut it behind the plate, so the organization shifted him to the outfield, but he was buried on the depth chart. In early January, they traded the fading prospect to the Royals. A return to catcher would obviously boost O'Brien's fantasy stock due to the shallow nature of the position, but that seems unlikely at this point, as he didn't catch a single game last season at any level, and KC has Salvador Perez. Despite the pitcher-friendliness of Kauffman Stadium, at least O'Brien may find a quicker path to relevance, and his power could play everywhere if it maxes out.
Where will O’Brien play? That’s the long-term question surrounding the slugging prospect, who made his MLB debut with Arizona last season though he only recorded 12 plate appearances in eight games. O’Brien has impressive power —- he belted 26 home runs in 534 plate appearances at Triple-A Reno last season, and he hit 34 homers in the minors in 2014. But at the start of 2015, O’Brien shifted from catcher to the outfield, catching just 11 games all season. O’Brien might not find regular playing time in a crowded Arizona outfield, and it’s been reported that he’s approached the organization about returning to catcher. If O’Brien can cut it as a big league catcher, his power at a sparse position will obviously be intriguing to fantasy owners. Keep an eye on this situation in the winter and into spring training.
The 24-year-old catching prospect was shipped to Arizona from the Yankees as the main returning piece in the Martin Prado trade. In 2014, he burst on the national prospect scene by belting 34 home runs in 427 plate appearances between High-A and Double-A. Catchers with 30-plus homer pop don’t typically show up in the big leagues, and O’Brien probably won’t be the guy to buck that trend. A .351 BABIP allowed him to hit .321 in 30 games at High-A, but upon his promotion to Double-A Trenton, he hit .245 in 72 games before getting traded. He also might not be able to stick behind the plate, as the Yankees had been trying him at first base before the trade, and would presumably have stuck with him at catcher if they thought he could handle it. He should reach Triple-A in short order, but it’s unlikely that he will hit enough for his power to continue to play up as he moves up the organizational ladder.
More Fantasy News
Remains in organization
1BMiami Marlins  AAA
Ribs
June 22, 2019
O'Brien (ribs) cleared waivers and was outrighted to Triple-A New Orleans on Saturday, Jordan McPherson of the Miami Herald reports.
ANALYSIS
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Designated for assignment
1BMiami Marlins  AAA
Ribs
June 20, 2019
O'Brien (ribs) was designated for assignment Thursday, Jordan McPherson of the Miami Herald reports.
ANALYSIS
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Beginning rehab assignment
1BMiami Marlins  AAA
Ribs
June 17, 2019
O'Brien (ribs) will begin a rehab assignment with High-A Jupiter on Tuesday, Jordan McPherson of the Miami Herald reports.
ANALYSIS
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Lands on injured list
1BMiami Marlins  AAA
Ribs
May 11, 2019
O'Brien was placed on the 10-day injured list with a left rib cage contusion Saturday.
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Not starting Sunday
1BMiami Marlins  AAA
May 5, 2019
O'Brien is out of the lineup for Sunday's game against the Braves, Joe Frisaro of MLB.com reports.
ANALYSIS
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