Mitchell Parker

Mitchell Parker

26-Year-Old PitcherSP
Washington Nationals
2025 Fantasy Outlook
Parker beat the eventual world champion Dodgers in his big-league debut in April, and while there were bumps in the road from there, his final numbers as a rookie were highly respectable. The left-hander made 29 starts and totaled 151 innings for the Nationals, pitching to a 4.29 ERA and 1.30 WHIP. HIs fastball is lacking and can get touched up, but his splitter and slider both had whiff rates over 35 percent last season, hinting at room for growth with his strikeout rate even with his below-average velocity. He had a nine-run disaster Aug. 15 at Philadelphia which should serve as a reminder of his downside in the wrong matchup. Eventually he could shed the streamer label, but at least for now Parker should be deployed judiciously, if rostered. Read Past Outlooks
RANKS
Rest of Season
From Preseason
#428
ADP
Signed a one-year contract with the Nationals in March of 2025.
Collects long-relief save
PWashington Nationals
September 21, 2025
Parker earned a save in the Nationals' 3-2 win over the Mets on Sunday. He allowed two hits and no walks while striking out two across 3.2 scoreless innings.
Analysis
Parker was dispatched in the sixth inning with two men on base and one out and managed to maintain the Nationals' one-run cushion by getting Jeff McNeil to pop out before striking out Mark Vientos. Parker remained in the game over the following three innings and successfully kept the Mets off the board to collect the first save of his major-league career. The 25-year-old southpaw posted a 7.19 ERA and 1.54 WHIP (across 56.1 innings) in 11 starts since the All-Star break, which prompted the Nationals to move Parker to the bullpen Friday.
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Pitching Stats
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2025 MLB Game Log
2025
2024
2025 MLB Game Log
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Scoring
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2024 MLB Game Log
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Pitching Appearances Breakdown
Average Pitch Count
82
Last 10 Games
56
Last 5 Games
21
How many pitches does Mitchell Parker 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 Mitchell Parker 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
 
 
-5%
BAA vs RHP
2025
 
 
-1%
BAA vs LHP
2024
 
 
-11%
BAA vs RHP
2023
No Stats
BAA Batters K BB H 2B 3B HR
Since 2023vs Left .276 343 65 26 86 13 4 7
Since 2023vs Right .263 1028 171 75 246 61 2 36
2025vs Left .270 187 24 19 44 6 3 6
2025vs Right .273 538 79 39 134 37 1 19
2024vs Left .282 156 41 7 42 7 1 1
2024vs Right .251 490 92 36 112 24 1 17
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
 
 
-33%
ERA at Home
2025
 
 
-5%
ERA at Home
2024
 
 
-60%
ERA at Home
2023
No Stats
ERA WHIP IP W L SV K/9 BB/9 HR/9
Since 2023Home 4.12 1.30 179.0 10 13 0 7.0 2.3 1.2
Since 2023Away 6.19 1.47 136.2 6 13 1 6.3 3.7 1.3
2025Home 5.56 1.53 90.2 5 9 0 6.3 3.0 1.3
2025Away 5.84 1.31 74.0 4 7 1 4.9 3.4 1.5
2024Home 2.65 1.05 88.1 5 4 0 7.8 1.5 1.1
2024Away 6.61 1.66 62.2 2 6 0 8.0 4.0 1.0
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 Mitchell Parker 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
1.78
 
K/9
5.6
 
BB/9
3.2
 
HR/9
1.4
 
Fastball
93.0 mph
 
ERA
5.68
 
WHIP
1.43
 
BABIP
.297
 
GB/FB
1.06
 
Left On Base
59.7%
 
Exit Velocity
84.5 mph
 
Barrels/BBE
6.1%
 
Spin Rate
2074 rpm
 
Balls Hit 95+ MPH
30.7%
 
Swinging Strike
9.6%
 
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 Mitchell Parker See More
Recent RotoWire Articles Featuring Mitchell Parker See More
2024 Fantasy Outlook
A 24-year-old lefty, Parker has been a notable prospect in a shallow Nationals farm system for a couple years, but poor control and middling stuff limited his realistic upside. Parker primarily operates with a 92-mph four-seamer with solid movement and an 80-mph curveball while also mixing in a mid-80s splitter. He walked between 11.1 and 15.4 percent of batters from 2022 through 2023 while pitching in the mid-to-upper minors, and he doesn't have the pure stuff to have success with that many free passes, but only issued one walk in his first two starts of 2024, with one of those coming against the Dodgers' big-league lineup. Assuming Parker spends a good chunk of 2024 in the big-league rotation, he could be a deep-league streamer in good matchups, but there's not much data to suggest he can maintain the success he's had early in the season.
More Fantasy News
Shifting to bullpen
PWashington Nationals
September 19, 2025
The Nationals have demoted Parker to the bullpen, Mark Zuckerman of MASNSports.com reports.
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Pummeled in loss
PWashington Nationals
September 15, 2025
Parker (8-16) suffered the loss Monday against Atlanta, coughing up six runs on 10 hits and one walk over five innings with one strikeout.
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Earns win with quality start
PWashington Nationals
September 9, 2025
Parker (8-15) allowed two runs on four hits and two walks over 7.2 innings Tuesday, striking out two and earning a win over the Marlins.
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Can't compete five frames Wednesday
PWashington Nationals
September 3, 2025
Parker came away with a no-decision in Wednesday's 10-5 win over the Marlins, giving up four runs (two earned) on seven hits and a walk over 4.2 innings. He struck out four.
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Remains winless in August
PWashington Nationals
August 30, 2025
Parker (7-15) took the loss Friday, giving up three runs on six hits over 6.1 innings as the Nationals fell 4-1 to the Rays. He struck out seven without walking a batter.
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