Yainer Diaz

Yainer Diaz

26-Year-Old CatcherC
Houston Astros
2025 Fantasy Outlook
Diaz took over as Houston's primary backstop in 2024 and hit 16 homers with a .299/.325/.441 slash line in 148 games, with 99 of those starts coming behind the plate. He was unable to recreate the 23 home runs and .846 OPS he posted in 2023, but the regression isn't a major surprise since he's now handling the most demanding defensive position after previously working as the secondary option. He was also much more productive in the second half of 2024 as he got more comfortable with the added defensive responsibilities. It wouldn't be surprising if Diaz cracks the 20-homer plateau in 2025, and there's plenty of potential for counting stats given Houston's strong lineup. He should again be a reliable fantasy catcher with enough upside to be one of the better producers at the position. Read Past Outlooks
RANKS
Rest of Season From Preseason
#56
ADP
Signed a one-year contract with the Astros in March of 2025.
Knocks in three
CHouston Astros
September 7, 2025
Diaz went 2-for-5 with a double, three RBI and a run scored Saturday against the Rangers.
Analysis
Diaz delivered an RBI double in the sixth inning and followed that up with a single that plated two in the eighth frame. This marked his first multi-hit effort in his last eight starts, though he has managed four extra-base hits in that span (all doubles). Diaz has also come through with timely hits lately, producing 15 RBI across his last 29 starts.
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Batting Stats
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2025 MLB Game Log
2025
2024
2023
2022
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2024 MLB Game Log
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2023 MLB Game Log
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Batting Order Slot Breakdown
vs Right-Handed Pitchers
vs RHP
#1
#2
#3
#4
#5
#6
#7
#8
#9
3
1
14
30
34
9
2
vs Left-Handed Pitchers
vs LHP
#1
#2
#3
#4
#5
#6
#7
#8
#9
1
6
9
6
3
Left/Right Batting Splits
Since 2023
 
 
+6%
OPS vs RHP
2025
 
 
+2%
OPS vs LHP
2024
 
 
+7%
OPS vs LHP
2023
 
 
+50%
OPS vs RHP
OPS PA R HR RBI SB AVG OBP SLG
Since 2023vs Left .726 381 47 14 47 1 .264 .299 .427
Since 2023vs Right .771 1120 123 43 157 2 .283 .308 .463
2025vs Left .703 108 12 5 13 0 .248 .287 .416
2025vs Right .686 397 37 13 47 1 .251 .280 .406
2024vs Left .806 170 22 6 25 1 .306 .341 .465
2024vs Right .751 449 48 10 59 1 .297 .318 .432
2023vs Left .620 103 13 3 9 0 .214 .243 .378
2023vs Right .931 274 38 20 51 0 .307 .332 .599
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Minor League Splits View Minor League Split Stats
Home/Away Batting Splits
Since 2023
 
 
+27%
OPS at Home
2025
 
 
+16%
OPS at Home
2024
 
 
+29%
OPS at Home
2023
 
 
+37%
OPS at Home
OPS PA R HR RBI SB AVG OBP SLG
Since 2023Home .849 764 102 34 117 2 .311 .336 .513
Since 2023Away .667 737 68 23 87 1 .244 .274 .392
2025Home .742 255 27 10 36 1 .266 .302 .440
2025Away .637 250 22 8 24 0 .234 .260 .377
2024Home .860 314 45 10 46 1 .337 .357 .503
2024Away .667 305 25 6 38 1 .260 .292 .375
2023Home .972 195 30 14 35 0 .328 .349 .624
2023Away .708 182 21 9 25 0 .231 .264 .444
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Stat Review
How does Yainer Diaz 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 2019 data (min 400 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.
  • Expected BA
    Expected Batting Average.
  • Expected SLG
    Expected Slugging Percentage.
  • Sprint Speed
    The speed of a runner from home to first, in feet per second.
  • Ground Ball %
    The percentage of balls put in play that are on the ground.
  • Line Drive %
    The percentage of balls put in play that are line drives.
  • Fly Ball %
    The percentage of balls put in play that are fly balls.
BB/K
0.24
 
BB Rate
4.0%
 
K Rate
16.9%
 
BABIP
.271
 
ISO
.159
 
AVG
.252
 
OBP
.283
 
SLG
.411
 
OPS
.694
 
wOBA
.302
 
Exit Velocity
90.3 mph
 
Hard Hit Rate
32.9%
 
Barrels/PA
7.0%
 
Expected BA
.279
 
Expected SLG
.481
 
Sprint Speed
21.7 ft/sec
 
Ground Ball %
45.8%
 
Line Drive %
18.7%
 
Fly Ball %
35.4%
 
Prospect Rankings History
Advanced Batting Stats
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Additional Stats
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Defensive Stats
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Batted Ball Stats
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Stats Vs Upcoming Pitchers
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Recent RotoWire Articles Featuring Yainer Diaz See More
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Past Fantasy Outlooks
2024
2023
Despite serving as the No. 2 option in Houston behind Martin Maldonado, Diaz cracked 23 homers and finished as a top-12 fantasy catcher last season. Diaz slashed .282/.308/.538 and Statcast says he actually underperformed in regards to batting average and slugging -- his .287 xBA and .546 xSLG both ranked in the top eight percent of the league. Diaz is not particularly interested in taking walks (2.9 BB%) and his chase rate leaves open some questions about the sustainability of his contact. Further, Diaz's 21.9% HR/FB seems destined to fall, even with the boost provided by the Crawford Boxes. That being said, the Astros have already committed to Diaz being "the main guy" in 2024, and any giveback in the rate stats should in theory be softened by an increase in playing time. He wasn't a big name when he was traded in 2021, but fast forward a few years and Diaz is looking like a key piece on a championship-caliber ballclub.
Diaz is a good enough hitter that he should get backup catcher work this season and beyond. It will be his defensive development that determines whether he becomes a workhorse behind the plate. On lesser teams, he might get work at first base and designated hitter in addition to catcher, but those starts should be few and far between when the Astros are fully healthy. The one major flaw in Diaz's offensive game is how frequently (38% in the minors) he chases pitches out of the zone. He hit .306/.356/.542 with a 31.3 Hard% and 25 home runs in 105 games between Double-A and Triple-A. Despite his propensity to chase, Diaz logged a stellar 17.8 K% at Triple-A, but walked just 5.9% of the time. Diaz was age-appropriate for a catcher in the upper levels.
More Fantasy News
Resting Friday
CHouston Astros
September 5, 2025
Diaz is not in the Astros' starting lineup against the Rangers on Friday, Matt Kawahara of the Houston Chronicle reports.
Analysis
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Good to go Friday
CHouston Astros
August 29, 2025
Diaz (hand) is starting behind the plate and batting seventh Friday against the Angels, Matt Kawahara of the Houston Chronicle reports.
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Remaining out of starting nine
CHouston Astros
Hand
August 28, 2025
Diaz (hand) is out of the lineup for Thursday's game against the Rockies, Matt Kawahara of the Houston Chronicle reports.
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Battling hand issue
CHouston Astros
Hand
August 27, 2025
Diaz is out of the lineup for Wednesday's game against the Rockies due to a hand injury, Chandler Rome of The Athletic reports.
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Taking seat Tuesday
CHouston Astros
August 26, 2025
Diaz is out of the lineup for Tuesday's game against the Rockies.
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Latest Fantasy Rumors
Option at first base?
CHouston Astros
July 20, 2024
The Astros could consider giving Diaz some playing time at first base, according to Chandler Rome of The Athletic.
Analysis
The 25-year-old has seen most of his playing time behind the plate this season but also has 24 starts at designated hitter. The Astros don't have a clear answer at first base since the release of Jose Abreu, as Jon Singleton likely isn't a long-term solution. Diaz has carried a hot bat since the start of June with an .834 OPS, and seeing some time at first base could help keep him in the lineup while keeping the DH spot open for Yordan Alvarez or other position players. Victor Caratini is closing in on a return from a hip strain, and once he's healthy it could open up a more versatile role for Diaz.
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