Robert Gasser

Robert Gasser

26-Year-Old PitcherSP
Milwaukee Brewers AAA
2026 Fantasy Outlook
Gasser underwent Tommy John surgery in June 2024 and returned to the big leagues in September 2025, positioning himself as a rotation option for 2026. The 26-year-old southpaw attacks hitters with two distinct low-90s fastballs, a sweeper, a changeup and a seldom-thrown cutter, getting by on depth of arsenal, guile and pitchability rather than loud stuff. His career swinging-strike rate is 10.6 percent, which is just below what southpaws Andrew Abbott and Matthew Boyd managed last year and a hair better than the likes of David Peterson and Yusei Kikuchi, so Gasser's Ks should tick up a bit over a larger sample. Brewers starters typically benefit from strong coaching and defense, so Gasser is in a good place to maximize his potential. Gasser probably won't be so good that you leave him in your mixed-league fantasy lineup every week, but he has a decent chance to be a high-end streamer in average or better matchups. He has thrown under 50 innings each of the last two seasons, so pushing up to around 120 innings would be considered a success in 2026. Read Past Outlooks
RANKS
Rest of Season From Preseason
#443
ADP
Signed a one-year contract with the Brewers in March of 2026.
Makes second start at Triple-A
PMilwaukee Brewers  AAA
April 15, 2026
Gasser (biceps/triceps) struck out four and yielded four earned runs on seven hits and one walk across 3.1 innings Friday in his most recent start for Triple-A Nashville.
Analysis
Gasser missed a turn through the Nashville rotation after experiencing muscle soreness in his left biceps and triceps following his season debut March 27, but he never required a stint on the injured list. Through his two starts, Gasser owns a 4.00 ERA, 1.44 WHIP and 15:4 K:BB in nine innings. According to Adam McCalvy of MLB.com, Kyle Harrison had been in line to start Friday in the Brewers' series opener in Miami, but he's expected to be pushed back a few days in the pitching schedule while he tends to a left wrist injury. Milwaukee thus looks like it will have a need for a spot starter this weekend, and Gasser should be a candidate to fill the opening.
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2025 MLB Game Log
2025
2024
2025 MLB Game Log
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2024 MLB Game Log
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Left/Right Pitching Splits
Since 2024
 
 
-33%
BAA vs LHP
2026
No Stats
2025
 
 
-100%
BAA vs LHP
2024
 
 
-6%
BAA vs LHP
BAA Batters K BB H 2B 3B HR
Since 2024vs Left .185 29 6 2 5 0 0 2
Since 2024vs Right .275 114 15 3 28 2 0 1
2026vs Left 0 0 0 0 0 0 0 0
2026vs Right 0 0 0 0 0 0 0 0
2025vs Left .000 9 1 2 0 0 0 0
2025vs Right .313 20 4 2 5 1 0 1
2024vs Left .250 20 5 0 5 0 0 2
2024vs Right .267 94 11 1 23 1 0 0
Home/Away Pitching Splits
Since 2024
 
 
-76%
ERA at Home
2026
No Stats
2025
 
 
-100%
ERA at Home
2024
 
 
-73%
ERA at Home
ERA WHIP IP W L SV K/9 BB/9 HR/9
Since 2024Home 1.46 1.01 24.2 2 1 0 6.9 1.1 0.7
Since 2024Away 6.00 1.44 9.0 0 1 0 2.0 2.0 1.0
2026Home 0 0 0 0 0 0 0 0 0
2026Away 0 0 0 0 0 0 0 0 0
2025Home 0.00 2.25 2.2 0 1 0 10.1 6.8 0.0
2025Away 6.00 1.00 3.0 0 1 0 6.0 6.0 3.0
2024Home 1.64 0.86 22.0 2 0 0 6.5 0.4 0.8
2024Away 6.00 1.67 6.0 0 0 0 0.0 0.0 0.0
Minor League Left/Right Pitching Splits (AAA)
Since 2024
 
 
-42%
BAA vs LHP
2026
 
 
-49%
BAA vs LHP
2025
 
 
-44%
BAA vs LHP
2024
 
 
-35%
BAA vs LHP
BAA Batters K BB H 2B 3B HR
Since 2024vs Left .156 70 28 3 10 1 0 3
Since 2024vs Right .271 151 40 17 36 8 1 3
2026vs Left .154 14 7 1 2 0 0 0
2026vs Right .304 26 8 3 7 2 0 1
2025vs Left .139 38 14 0 5 1 0 1
2025vs Right .247 92 22 10 20 2 1 0
2024vs Left .200 18 7 2 3 0 0 2
2024vs Right .310 33 10 4 9 4 0 2
Prospect Rankings History
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Recent RotoWire Articles Featuring Robert Gasser See More
Rotowire Staff
25 days ago
Recent RotoWire Articles Featuring Robert Gasser See More
Past Fantasy Outlooks
2025
2024
2023
Gasser is one of Milwaukee's top prospects and delivered a 2.57 ERA and 16:1 K:BB in his first five big-league starts in 2024, but he was lost for the season after undergoing Tommy John surgery in June. The left-hander is likely to spend most of the 2025 campaign rehabbing from the procedure, though he could make an impact late in the season. Realistically, Gasser won't be a major contributor for the Brewers or fantasy managers until 2026.
A 24-year-old lefty who safely projects to make it as at least a back-end starter, Gasser has thrown 161.2 innings at Triple-A and finished 2023 with a 3.09 ERA, 1.17 WHIP and 115 strikeouts over his final 93.1 innings. What Gasser lacks in quality offerings (zero plus pitches, 92-mph average fastball velocity) he makes up for in quantity -- he threw over 100 four-seamers, changeups, curveballs, cutters, sinkers, sliders and sweepers at Triple-A. His game is to keep hitters guessing while adeptly locating his pitches. What used to be a deep, talented Brewers rotation is now extremely top-heavy, so the back few spots should be cycled based on merit and health, and Gasser will surely get a look at some point, if not at the beginning of the season. He doesn't have the type of electric arsenal to be a bullpen weapon, so Gasser should stay stretched out all year.
We may never know for sure, but Gasser may have been the return piece Milwaukee most coveted from San Diego in the surprise Josh Hader deal at the deadline. Esteury Ruiz, the other top player the Brewers got back, has already been flipped in the three-team trade that sent William Contreras to Milwaukee. Gasser remains, and has a chance to follow in the impressive line of young starters to populate the Brewers' rotation. He had a 3.47 ERA, 1.37 WHIP and 57:24 K:BB in 46.2 innings across nine starts at Double-A and Triple-A after the trade - the 23-year-old's first starts above High-A. As things stand, Gasser would be the most exciting option whenever the Brewers need a sixth starter, and he is nearing big-league readiness. That said, the team generally breaks in their prized pitching prospects out of the bullpen before moving them to the rotation full time. Gasser looks more like a No. 4 starter based just on his low-90s fastball velocity and secondary offerings. However, his deceptive left-handed delivery and the ride he gets on his fastball allow the pitch to play up when he is locating it. Additionally, his slider and changeup play perfectly off his fastball, so it's easy to see how the Brewers could turn him into a No. 3 starter as long as he throws enough strikes.
More Fantasy News
Nursing arm injury
PMilwaukee Brewers  AAA
Biceps
April 8, 2026
Gasser hasn't made an appearance for Triple-A Nashville since March 27 while dealing with muscle soreness in his left biceps and triceps, Curt Hogg of the Milwaukee Journal Sentinel reports.
Analysis
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Sent to Triple-A
PMilwaukee Brewers  AAA
March 22, 2026
The Brewers optioned Gasser to Triple-A Nashville on Sunday, Curt Hogg of the Milwaukee Journal Sentinel reports.
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Goes 2.2 frames Thursday
PMilwaukee Brewers  AAA
March 6, 2026
Gasser allowed three earned runs over 2.2 innings in Thursday's spring game against the Rockies. He gave up three hits, struck out two batters and walked three.
Analysis
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Set for opener duties
PMilwaukee Brewers  AAA
September 26, 2025
Gasser is expected to serve as Milwaukee's opening pitcher for Saturday's game against the Reds, Adam McCalvy of MLB.com reports.
Analysis
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Yields two runs in season debut
PMilwaukee Brewers  AAA
September 21, 2025
Gasser (0-1) allowed two runs on one hit and two walks over three innings Sunday, striking out two and taking a loss against St. Louis.
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Latest Fantasy Rumors
Candidate to crack rotation
PMilwaukee Brewers  AAA
March 6, 2026
Gasser is in the mix to earn a rotation spot with the Brewers ahead of the 2026 regular season, according to Adam McCalvy of MLB.com.
Analysis
An elbow injury limited Gasser to just two regular-season appearances in 2025, but he's healthy in 2026, and that means he'll continue battling for a rotation role before the start of the 2026 season. He's in a battle for a rotation spot alongside names such as Brandon Sproat, Kyle Harrison and Logan Henderson.
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