2025 Stats
W-L
4-4
ERA
4.80
WHIP
1.49
K
68
SV
0
Rest-of-Season Projections
2025 Fantasy Outlook
Birdsong began last season at Double-A Richmond but wound up making 16 starts for the Giants. He flashed plenty of swing-and-miss ability with a 27.9 percent strikeout rate and a pair of double-digit strikeout outings, but the young right-hander also had an ugly 13.7 percent walk rate and completed six innings in just one of his 16 starts. Birdsong has three legitimate secondary pitches in his curveball, changeup and slider, with each garnering a whiff rate of at least 32.7 percent and all three offerings earning excellent Stuff+ grades. However, his Location+ of 92 was among the worst in baseball for a regular starter, which no doubt was the main reason why opponents had an obscene 50 percent hard-hit rate. There's legitimate upside with Birdsong and he could open 2025 in the Giants' rotation, but he'll have to improve his command and control to be a reliable option in fantasy. Read Past Outlooks
Signed a one-year contract with the Giants in March of 2025.
Sent down after disastrous start
The Giants optioned Birdsong to Triple-A Sacramento on Tuesday, Shayna Rubin of the San Francisco Chronicle reports.
Analysis
The transaction comes one day after Birdsong failed to record an out while allowing five runs on one hit and four walks in a loss to Atlanta. The disastrous outing was more than just a one-start blip for the righty, as Birdsong had collected a 10.38 ERA and 17:18 K:BB across 17.1 innings covering his last five outings. Carson Seymour has been recalled from Sacramento and could take Birdsong's spot in the rotation, with Mason Black and Carson Whisenhunt also representing options.
The transaction comes one day after Birdsong failed to record an out while allowing five runs on one hit and four walks in a loss to Atlanta. The disastrous outing was more than just a one-start blip for the righty, as Birdsong had collected a 10.38 ERA and 17:18 K:BB across 17.1 innings covering his last five outings. Carson Seymour has been recalled from Sacramento and could take Birdsong's spot in the rotation, with Mason Black and Carson Whisenhunt also representing options.
Pitching Stats
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2025 MLB Game Log
2025
2024
Minor League Game Log
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Pitching Appearances Breakdown
Average Pitch Count
57
Last 10 Games
81
Last 5 Games
71
How many pitches does Hayden Birdsong 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+
What part of the game does Hayden Birdsong generally pitch?
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
-14%
BAA vs RHP
2025
-27%
BAA vs RHP
| BAA | K | BB | H | HR | |
|---|---|---|---|---|---|
| Since 2023vs Left | .245 | 81 | 49 | 67 | 11 |
| Since 2023vs Right | .210 | 75 | 31 | 51 | 10 |
| 2025vs Left | .281 | 33 | 21 | 34 | 7 |
| 2025vs Right | .206 | 35 | 16 | 27 | 3 |
| 2024vs Left | .217 | 48 | 28 | 33 | 4 |
| 2024vs Right | .214 | 40 | 15 | 24 | 7 |
| 2023vs Left | 0 | 0 | 0 | 0 | 0 |
| 2023vs Right | 0 | 0 | 0 | 0 | 0 |
Home/Away Pitching Splits
Since 2023
-22%
ERA at Home
2025
-20%
ERA at Home
| ERA | WHIP | IP | K/9 | BB/9 | |
|---|---|---|---|---|---|
| Since 2023Home | 4.15 | 1.38 | 65.0 | 9.8 | 4.8 |
| Since 2023Away | 5.33 | 1.49 | 72.2 | 10.5 | 5.6 |
| 2025Home | 4.28 | 1.37 | 33.2 | 8.3 | 4.3 |
| 2025Away | 5.34 | 1.63 | 32.0 | 10.4 | 5.9 |
| 2024Home | 4.02 | 1.40 | 31.1 | 11.5 | 5.5 |
| 2024Away | 5.31 | 1.38 | 40.2 | 10.6 | 5.3 |
| 2023Home | 0 | 0 | 0 | 0 | 0 |
| 2023Away | 0 | 0 | 0 | 0 | 0 |
Minor League Left/Right Pitching Splits (AAA)
Since 2023
-62%
BAA vs LHP
2025
No Stats
| BAA | K | BB | H | HR | |
|---|---|---|---|---|---|
| Since 2023vs Left | .111 | 5 | 4 | 1 | 0 |
| Since 2023vs Right | .292 | 9 | 2 | 7 | 1 |
| 2025vs Left | 0 | 0 | 0 | 0 | 0 |
| 2025vs Right | 0 | 0 | 0 | 0 | 0 |
| 2024vs Left | .111 | 5 | 4 | 1 | 0 |
| 2024vs Right | .292 | 9 | 2 | 7 | 1 |
| 2023vs Left | 0 | 0 | 0 | 0 | 0 |
| 2023vs Right | 0 | 0 | 0 | 0 | 0 |
Stat Review
How does Hayden Birdsong 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.
* 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
1.84K/9
9.3BB/9
5.1HR/9
1.4Fastball
95.6 mphERA
4.80WHIP
1.49BABIP
.303GB/FB
0.82Left On Base
66.7%Exit Velocity
83.1 mphBarrels/BBE
5.8%Spin Rate
2288 rpmBalls Hit 95+ MPH
27.7%Swinging Strike
11.4%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
Known for his premium stuff and wild control heading into 2023, Birdsong kept the starting pitching dream alive by throwing more strikes than expected as a 21-year-old at Single-A and High-A. From April 26 through July 30, Birdsong had a 2.48 ERA, 1.06 WHIP, 100 strikeouts and 25 walks in 69 innings. That dominant run was book-ended by some struggles, particularly a 12.5 percent walk rate in 23 innings after a late-season promotion to Double-A. Birdsong's stuff and potential home park are still an alluring combination in dynasty leagues. The 6-foot-4 righty boasts a plus mid-90s fastball, a potentially plus low-80s curveball and a solid slider. If he shows improved control in a return to Double-A, Birdsong will have an up arrow next to his name as a potential high-strikeout mid-rotation starter who could reach the majors in late 2024 or early 2025. An eventual move to relief remains a possibility.
More Fantasy News
Fails to record an out Monday
Birdsong (4-4) suffered the loss Monday at Atlanta, allowing five runs on one hit, four walks and a hit-by-pitch while not retiring any of the six batters he faced.
Analysis
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Won't get start this week
Birdsong isn't scheduled to make a start during the Giants' three-game series with the Dodgers this weekend, Shayna Rubin of the San Francisco Chronicle reports.
Analysis
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Gets away with wildness in win
Birdsong (4-3) allowed one run on three hits and five walks while striking out six over five innings to earn the win Sunday over the Athletics.
Analysis
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Loses again Tuesday
Birdsong (3-3) allowed four runs (three earned) on three hits and four walks while striking out six over four innings to take the loss Tuesday versus the Diamondbacks.
Analysis
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Roughed up in loss
Birdsong (3-2) allowed seven runs on four hits and four walks while striking out one over four-plus innings to take the loss Thursday versus the Marlins.
Analysis
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Latest Fantasy Rumors
Slated to start May 20
Birdsong is expected to start against the Royals on Tuesday, May 20, according to Susan Slusser of the San Francisco Chronicle.
Analysis
Things could change between now and Tuesday, but as of now, Birdsong is slated to move into the rotation and face the Royals in the second matchup of a three-game series following the demotion of Jordan Hicks to the bullpen. Birdsong posted a 4.75 ERA in 16 starts as a rookie in 2024, but he's been more effective as a reliever early in 2025 with a 2.31 ERA and 25:10 K:BB over 23.1 innings.
Things could change between now and Tuesday, but as of now, Birdsong is slated to move into the rotation and face the Royals in the second matchup of a three-game series following the demotion of Jordan Hicks to the bullpen. Birdsong posted a 4.75 ERA in 16 starts as a rookie in 2024, but he's been more effective as a reliever early in 2025 with a 2.31 ERA and 25:10 K:BB over 23.1 innings.