Will Brennan

Will Brennan

28-Year-Old OutfielderOF
San Francisco Giants AAA
2026 Fantasy Outlook
There was no outlook written for Will Brennan in 2026. Check out the latest news below for more on his current fantasy value.
Signed a one-year contract with the Giants in February of 2026.
Dispatched to Triple-A
OFSan Francisco Giants  AAA
March 24, 2026
The Giants optioned Brennan to Triple-A Sacramento on Tuesday, Shayna Rubin of the San Francisco Chronicle reports.
Analysis
Brennan's .325/.386/.500 slash line through 44 plate appearances in the Cactus League made a strong case for him to break camp with the big club, but he'll ultimately head back to the minors to begin the year. The 28-year-old outfielder has routinely batted above .300 at the Triple-A level and could earn a spot on the Giants' bench if he continues to swing a hot bat.
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Batting Stats
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2025 MLB Game Log
2025
2024
2023
2022
2025 MLB Game Log
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2024 MLB Game Log
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2023 MLB Game Log
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2022 MLB Game Log
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Left/Right Batting Splits
Since 2024
 
 
+94%
OPS vs RHP
2026
No Stats
2025
 
 
-100%
OPS vs RHP
2024
 
 
+98%
OPS vs RHP
OPS PA R HR RBI SB AVG OBP SLG
Since 2024vs Left .371 35 4 0 2 1 .143 .143 .229
Since 2024vs Right .719 331 33 8 28 3 .271 .323 .395
2026vs Left 0 0 0 0 0 0 0 0 0
2026vs Right 0 0 0 0 0 0 0 0 0
2025vs Left 0 0 0 0 0 0 0 0 0
2025vs Right .322 13 0 0 0 0 .091 .231 .091
2024vs Left .371 35 4 0 2 1 .143 .143 .229
2024vs Right .734 318 33 8 28 3 .278 .327 .407
Home/Away Batting Splits
Since 2024
 
 
+16%
OPS at Home
2026
No Stats
2025
 
 
+171%
OPS on Road
2024
 
 
+18%
OPS at Home
OPS PA R HR RBI SB AVG OBP SLG
Since 2024Home .739 171 20 5 17 0 .267 .310 .429
Since 2024Away .636 195 17 3 13 4 .250 .303 .333
2026Home 0 0 0 0 0 0 0 0 0
2026Away 0 0 0 0 0 0 0 0 0
2025Home .167 6 0 0 0 0 .000 .167 .000
2025Away .452 7 0 0 0 0 .167 .286 .167
2024Home .757 165 20 5 17 0 .276 .315 .442
2024Away .642 188 17 3 13 4 .253 .303 .339
Minor League Left/Right Batting Splits (AAA)
Since 2024
 
 
+55%
OPS vs RHP
2026
 
 
+93%
OPS vs LHP
2025
 
 
+93%
OPS vs RHP
2024
 
 
+39%
OPS vs RHP
OPS PA R HR RBI SB AVG OBP SLG
Since 2024vs Left .546 34 0 2 .219 .265 .281
Since 2024vs Right .846 170 4 23 .338 .371 .475
2026vs Left 1.000 2 0 0 .500 1.000 .500
2026vs Right .518 8 0 1 .286 2.000 .286
2025vs Left .410 27 0 2 .192 6.000 .231
2025vs Right .792 129 3 16 .328 47.000 .459
2024vs Left .700 5 0 0 .250 1.200 .500
2024vs Right .974 33 1 6 .387 14.000 .581
Stat Review
How does Will Brennan 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
1.00
 
BB Rate
7.7%
 
K Rate
7.7%
 
BABIP
.100
 
ISO
.000
 
AVG
.091
 
OBP
.231
 
SLG
.091
 
OPS
.322
 
wOBA
.177
 
Exit Velocity
82.2 mph
 
Hard Hit Rate
10.0%
 
Barrels/PA
0.0%
 
Expected BA
.090
 
Expected SLG
.126
 
Sprint Speed
26.1 ft/sec
 
Ground Ball %
60.0%
 
Line Drive %
0.0%
 
Fly Ball %
40.0%
 
Prospect Rankings History
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Recent RotoWire Articles Featuring Will Brennan See More
Recent RotoWire Articles Featuring Will Brennan See More
Past Fantasy Outlooks
2025
2024
2023
Brennan settled in as a decent platoon option in an increasingly crowded Cleveland outfield in 2024. The lefty bat slashed .264/.309/.388 with eight home runs and 30 RBI in 114 games. Those were very similar numbers to Brennan's 2023 campaign, when he appeared in 138 games for the Guardians. The 26-year-old has sported fairly conventional splits during his time with the team, posting a .727 OPS against righties the past three seasons but only a .453 OPS against southpaws. Brennan should occupy a similar role in 2025, though the team got deeper in the outfield last year with the trade deadline acquisition of Lane Thomas and the emergence of youngster Jhonkensy Noel down the stretch. Brennan is a steady if not spectacular hitter, and he can have some fantasy value when he's in the lineup, but he shouldn't be counted on for a breakout performance this coming season.
In another era, Brennan might have been viewed differently given that he has put up high batting averages consistently throughout his time in professional baseball. However, modern fans and front offices can see that it's a rather empty batting average. Brennan managed five home runs and 13 steals in 455 big-league plate appearances last season at the age of 25. Worst of all is the fact that Brennan has been averse to drawing walks, managing just a 3.6 BB% and .308 OBP through 500 plate appearances in the majors to date. He's a quality defender in right field and projects to start there for the Guardians on Opening Day, but there will be pressure on him to provide more offensively in his second full season.
Brennan was a popular favorite among prospect analysts all season, but the secret is out after he impressed in a brief cup of coffee with the big club. The Guardians have built their offense around high-contact hitters, and Brennan fits that mold perfectly. He had an 11.5 K% across Double-A, Triple-A and the majors, and his 8.9 K% in 45 MLB plate appearances was his lowest mark at any level since rookie ball. Brennan's BB% dipped from 10.8% at Double-A to 7.6% at Triple-A and 4.4% in the majors, so at this stage it's more about contact than patience. He hit above .310 at all three stops last year. As a lefty hitter with a good glove and a dash of power and speed in the minors, Brennan is similar in many ways to teammate Steven Kwan. Like with Kwan, Brennan's hard-hit data isn't very impressive and he hit just 14 homers on the year, so the hit tool has to be as good as advertised for the whole package to work. While he isn't as good of a defender as Myles Straw, he has a much higher overall ceiling due to Straw's woeful offense. The Guardians have several big-league-ready outfielders waiting for an opportunity, but Brennan is probably the best of the bunch, and could take over for Straw whenever the club is ready to shift him to a fourth outfielder role.
More Fantasy News
Logs RBI in spring loss
OFSan Francisco Giants  AAA
March 15, 2026
Brennan started at center field and went 1-for-3 with an RBI and a run scored in Saturday's 8-7 Cactus League loss to the Diamondbacks.
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Joins San Francisco
OFSan Francisco Giants  AAA
February 15, 2026
Brennen (elbow) agreed to a one-year, major-league contract with the Giants on Sunday, Justice delos Santos of The San Jose Mercury News reports.
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Hits free agency
OFFree Agent  AAA
Elbow
November 21, 2025
Brennan (elbow) was non-tendered by the Guardians on Friday, Paul Hoynes of The Cleveland Plain Dealer reports.
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Back from IL
OFCleveland Guardians  AAA
November 6, 2025
Brennan (elbow) was activated from the injured list Thursday, Tim Stebbins of MLB.com reports.
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Undergoes sports hernia surgery
OFCleveland Guardians  AAA
Elbow
September 5, 2025
Brennan (elbow) recently underwent sports hernia surgery, Tim Stebbins of MLB.com reports.
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