Spencer Schwellenbach

Spencer Schwellenbach

25-Year-Old PitcherSP
Atlanta Braves
2025 Fantasy Outlook
Schwellenbach was one of the biggest surprises of the 2024 season, as he posted a 3.35 ERA, 1.04 WHIP and 127:23 K:BB across 123.2 innings spanning 21 starts for Atlanta after getting the call in late May. He was especially stingy down the stretch, going 5-2 with a 2.47 ERA, 0.96 WHIP and six strikeouts for every one walk in his final 73 innings. While he had some prospect pedigree as a second-round pick in 2021, this level of success was impossible to foresee for a player that had not pitched above the High-A level coming into the season. After missing all of 2022 following Tommy John surgery, Schwellenbach made his professional debut in 2023, pitching a total of 65 innings that year. In another day and age, the jump from 65 innings to 168.2 total frames last season would scare some drafters off, but conventional wisdom regarding pitching injuries has been challenged in recent years. Most will be eager to draft an arm of this caliber, so long as the pitcher is ostensibly healthy in the moment. A jump in strikeouts is possible with his six-pitch mix and 96th percentile chase rate. Read Past Outlooks
RANKS
Rest of Season From Preseason
#90
ADP
$Signed a one-year contract with Atlanta in May of 2024.
Strikes out 11 in win
PAtlanta Braves
May 31, 2025
Schwellenbach (4-4) earned the win against the Red Sox on Saturday, allowing five hits and no walks while striking out 11 over 6.1 innings.
ANALYSIS
Schwellenbach generated 16 whiffs on 99 pitches and matched a season high with 11 strikeouts for the second consecutive game. The 25-year-old has pitched into the seventh inning in each of his last four starts and has delivered nine quality starts across 12 outings. He'll take a 3.13 ERA, 1.03 WHIP and 71:12 K:BB over 74.2 innings into a road matchup with the Giants next weekend.
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Pitching Stats
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2025
2024
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Pitching Appearances Breakdown
Average Pitch Count
92
Last 10 Games
91
Last 5 Games
94
How many pitches does Spencer Schwellenbach 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 Spencer Schwellenbach 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
 
 
-18%
BAA vs RHP
2025
 
 
-14%
BAA vs RHP
2024
 
 
-21%
BAA vs RHP
2023
No Stats
BAA Batters K BB H 2B 3B HR
Since 2023vs Left .249 421 87 25 97 21 4 16
Since 2023vs Right .204 379 111 10 74 20 1 7
2025vs Left .244 167 32 9 38 5 1 9
2025vs Right .211 133 39 3 27 9 0 0
2024vs Left .253 254 55 16 59 16 3 7
2024vs Right .200 246 72 7 47 11 1 7
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
 
 
-23%
ERA at Home
2025
 
 
-54%
ERA at Home
2024
 
 
-2%
ERA on Road
2023
No Stats
ERA WHIP IP W L SV K/9 BB/9 HR/9
Since 2023Home 2.91 0.99 117.2 8 6 0 9.6 1.1 1.3
Since 2023Away 3.79 1.10 80.2 4 5 0 8.1 2.2 0.7
2025Home 2.29 1.02 51.0 3 2 0 9.7 1.2 0.9
2025Away 4.94 1.06 23.2 1 2 0 6.1 1.9 1.5
2024Home 3.38 0.98 66.2 5 4 0 9.5 1.1 1.6
2024Away 3.32 1.12 57.0 3 3 0 9.0 2.4 0.3
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 Spencer Schwellenbach compare to other starting pitchers?
This section compares his stats with all starting pitcher seasons from the previous three seasons (minimum 120 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 120 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
5.92
 
K/9
8.6
 
BB/9
1.4
 
HR/9
1.1
 
Fastball
96.7 mph
 
ERA
3.13
 
WHIP
1.03
 
BABIP
.286
 
GB/FB
1.96
 
Left On Base
71.4%
 
Exit Velocity
83.5 mph
 
Barrels/BBE
4.5%
 
Spin Rate
2176 rpm
 
Balls Hit 95+ MPH
26.2%
 
Swinging Strike
13.4%
 
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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2024 Fantasy Outlook
Atlanta gave Schwellenbach $1 million after drafting him out of Nebraska in the second round in 2021 and he had Tommy John surgery right after the draft. He put up good numbers in 2023 as a 23-year-old in the lower levels, but his stuff ticked up in 2024, with his fastball going from a 93-94 mph pitch to a 95-96 mph offering. He generated groundballs over 55 percent of the time at High-A and Double-A and was surprisingly summoned to the big-league rotation after just two starts at Double-A. There's nothing about Schwellenbach's arsenal or command that would cap his short-term potential, but even as an older prospect, it's quite the jump in competition to the majors after logging only 13 innings above High-A, so there could be some understandable bumps in the road.
More Fantasy News
Fans 11 in losing effort
PAtlanta Braves
May 25, 2025
Schwellenbach (3-4) took the loss Sunday against San Diego. He pitched seven innings, allowing four runs (two earned) on seven hits and no walks with 11 strikeouts.
ANALYSIS
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Goes seven innings in win
PAtlanta Braves
May 18, 2025
Schwellenbach (3-3) earned the win against the Red Sox on Sunday, allowing four runs on six hits and one walk with three strikeouts over seven innings.
ANALYSIS
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Collects second win
PAtlanta Braves
May 14, 2025
Schwellenbach (2-3) picked up the win Tuesday, giving up two runs on four hits and two walks over seven innings in a 5-2 victory over the Nationals. He struck out three.
ANALYSIS
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Bounces back in no-decision
PAtlanta Braves
May 8, 2025
Schwellenbach didn't factor into the decision Thursday against the Reds after allowing one run on five hits and two walks in six innings. He struck out six.
ANALYSIS
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Hit hard by Dodgers
PAtlanta Braves
May 3, 2025
Schwellenbach (1-3) took the loss against the Dodgers on Saturday, allowing six runs on eight hits and one walk while striking out four batters over 3.2 innings.
ANALYSIS
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