Carson Seymour

Carson Seymour

26-Year-Old PitcherRP
San Francisco Giants
2025 Fantasy Outlook
A big 6-foot-6 righty whose groundball rates have typically been above 50 percent thanks to a plus sinker and plus slider, Seymour may profile best as a reliever long term due to his lack of a quality third pitch. He logged a 4.82 ERA, 1.57 WHIP and 132 strikeouts in 134.1 innings across 29 appearances for Triple-A Sacramento, where he will likely return to start 2025. Seymour was added to the 40-man roster this offseason to protect him from the Rule 5 draft, and he could work as a spot starter or long reliever for the big club. Read Past Outlooks
Signed a one-year contract with the Giants in March of 2025.
Shows improvement in first win
PSan Francisco Giants
September 5, 2025
Seymour (1-2) notched the win Friday against the Cardinals, allowing one run on two hits and one walk in five innings. He struck out two.
Analysis
Seymour threw a season-high five innings, and it was a considerable step forward after he yielded a season-worst four runs in his last start. The 26-year-old right-hander is still in the process of building up his pitch count while filling in for the injured Landen Roupp (knee), as the former tossed a season-high 75 pitches Friday. Seymour will bring a 4.25 ERA, 1.35 WHIP and 20:12 K:BB across 29.2 innings into his next outing, which is set to come against the division-rival Diamondbacks.
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Pitching Stats
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2025 MLB Game Log
2025
2025 MLB Game Log
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Pitching Appearances Breakdown
Average Pitch Count
42
Last 10 Games
44
Last 5 Games
47
How many pitches does Carson Seymour generally throw?
 
1-10
 
11-20
 
21-30
 
31-40
 
41-50
 
51-60
 
61-70
 
71-80
 
81-90
 
91-100
 
101-110
 
111-120
 
121+
 
1-10
 
11-20
 
21-30
 
31-40
 
41-50
 
51-60
 
61-70
 
71-80
 
81-90
 
91-100
 
101-110
 
111-120
 
121+
 
1-10
 
11-20
 
21-30
 
31-40
 
41-50
 
51-60
 
61-70
 
71-80
 
81-90
 
91-100
 
101-110
 
111-120
 
121+
What part of the game does Carson Seymour generally pitch?
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
% Games Reaching Innings Threshold
% Games By Number of Innings Pitched
Left/Right Pitching Splits
Since 2023
 
 
-39%
BAA vs RHP
2025
 
 
-39%
BAA vs RHP
2024
No Stats
2023
No Stats
BAA Batters K BB H 2B 3B HR
Since 2023vs Left .314 57 6 6 16 4 0 2
Since 2023vs Right .190 70 14 6 12 1 0 6
2025vs Left .314 57 6 6 16 4 0 2
2025vs Right .190 70 14 6 12 1 0 6
2024vs Left 0 0 0 0 0 0 0 0
2024vs Right 0 0 0 0 0 0 0 0
2023vs Left 0 0 0 0 0 0 0 0
2023vs Right 0 0 0 0 0 0 0 0
More Splits View More Split Stats
Home/Away Pitching Splits
Since 2023
 
 
-36%
ERA on Road
2025
 
 
-36%
ERA on Road
2024
No Stats
2023
No Stats
ERA WHIP IP W L SV K/9 BB/9 HR/9
Since 2023Home 5.27 1.61 13.2 0 2 0 4.6 5.3 2.6
Since 2023Away 3.38 1.13 16.0 1 0 0 7.3 2.3 2.3
2025Home 5.27 1.61 13.2 0 2 0 4.6 5.3 2.6
2025Away 3.38 1.13 16.0 1 0 0 7.3 2.3 2.3
2024Home 0 0 0 0 0 0 0 0 0
2024Away 0 0 0 0 0 0 0 0 0
2023Home 0 0 0 0 0 0 0 0 0
2023Away 0 0 0 0 0 0 0 0 0
More Splits View More Split Stats
Stat Review
How does Carson Seymour compare to other relievers?
This section compares his stats with all relief pitcher seasons from the previous three seasons (minimum 30 innings)*. 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, Barrels/BBE %, Balls Hit 95+ MPH %, and Spin Rate are benchmarked against 2019 data (min 30 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
  • K/BB
    Strikeout to walk ratio.
  • K/9
    Average strikeouts per nine innings.
  • BB/9
    Average walks per nine innings.
  • HR/9
    Average home runs allowed per nine innings.
  • Fastball
    Average fastball velocity.
  • ERA
    Earned run average. The average earned runs allowed per nine innings.
  • WHIP
    Walks plus hits per inning pitched.
  • BABIP
    Batting average on balls in play. Measures how many balls in play against a pitcher go for hits.
  • GB/FB
    Groundball to flyball ratio. The higher the number, the more likely a pitcher is to induce groundballs.
  • Left On Base
    The percentage of base runners that a pitcher strands on base over the course of a season.
  • Exit Velocity
    The speed of the baseball as it comes off the bat, immediately after a batter makes contact.
  • Barrels/BBE
    The percentage of batted ball events resulting in 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.
  • Spin Rate
    Spin Rate is the rate of spin on a baseball after it is released. It is measured in revolutions per minute (rpm).
  • Balls Hit 95+ MPH
    The percentage of batted balls hit that met or exceeded the 95 MPH threshold.
  • Swinging Strike
    The percentage of pitches that result in a swing and a miss.
K/BB
1.67
 
K/9
6.1
 
BB/9
3.6
 
HR/9
2.4
 
Fastball
96.4 mph
 
ERA
4.25
 
WHIP
1.35
 
BABIP
.239
 
GB/FB
1.74
 
Left On Base
83.3%
 
Exit Velocity
85.4 mph
 
Barrels/BBE
12.8%
 
Spin Rate
2223 rpm
 
Balls Hit 95+ MPH
34.4%
 
Swinging Strike
9.5%
 
Prospect Rankings History
Advanced Pitching Stats
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Defensive Stats
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Stats Vs Today's Lineup
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Recent RotoWire Articles Featuring Carson Seymour See More
Recent RotoWire Articles Featuring Carson Seymour See More
More Fantasy News
Receiving another start
PSan Francisco Giants
September 5, 2025
Seymour is slated to start Friday's game against the Cardinals in St. Louis.
Analysis
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Struggles through short outing
PSan Francisco Giants
August 31, 2025
Seymour (0-2) took the loss against Baltimore on Saturday, allowing four runs on five hits and two walks while striking out two batters over three innings.
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First MLB start on tap
PSan Francisco Giants
August 30, 2025
The Giants named Seymour their starting pitcher for Saturday's game against the Orioles at Oracle Park, Susan Slusser of the San Francisco Chronicle reports.
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Fans three in bulk relief
PSan Francisco Giants
August 20, 2025
Seymour surrendered one earned run on three hits and one walk while striking out three across three innings in Tuesday's 5-1 loss to the Padres.
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Works long relief Saturday
PSan Francisco Giants
August 10, 2025
Seymour allowed one earned run on four hits while striking out one over three innings in Saturday's 4-2 loss to the Nationals.
Analysis
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