Roki Sasaki

Roki Sasaki

23-Year-Old PitcherSP
Los Angeles Dodgers
60-Day IL
Injury Shoulder
Est. Return 8/25/2025
2025 Fantasy Outlook
As a 20-year-old NPB phenom, Sasaki threw a perfect game and followed that up with eight perfect innings in his next start. Three years later, he's set to get his shot at the MLB level. He's sure to generate a ton of interest due to his youth and potential, but there's plenty of downside with Sasaki as well. First and foremost are durability concerns. He topped out at 20 starts and 129.1 innings in 2022 and has averaged 16.5 starts and 101 innings over the last two years while battling oblique and arm issues. He's taking steps to address those concerns by decreasing his fastball velocity and pitching to contact more often, with his fastball now sitting in the upper 90s instead of triple digits and his K% falling from 39.1% in 2023 to 28.6% in 2024. That could mean Sasaki is simply getting worse rather than making a conscious decision to stay healthy, as it did result in a career-high ERA - but when a 2.35 ERA represents a career high, expect MLB teams to remain very interested. Read Past Outlooks
RANKS
Rest of Season From Preseason
#105
ADP
Signed a one-year contract with the Dodgers in March of 2025.
All set for rehab assignment
PLos Angeles Dodgers
Shoulder
August 9, 2025
Sasaki (shoulder) will begin a rehab a rehab assignment with Triple-A Oklahoma City on Thursday, Bill Plunkett of The Orange County Register reports.
Analysis
After tossing three simulated innings Friday without incident, Sasaki is ready to move on to the final phase of his recovery program by pitching in minor-league games. The Dodgers are targeting Sasaki for three innings Thursday in what will mark his first official game action since May 9 after he had been shut down due to a right shoulder impingement. Sasaki will likely need at least three rehab starts before he's stretched out enough to handle a typical starter's workload, though it's not immediately clear if the rookie will recapture a rotation spot upon his return. In his eight starts prior to landing on the shelf, Sasaki posted a 1-1 record with a 4.72 ERA, 1.49 WHIP and 24:22 K:BB across 34.1 innings.
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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
75
Last 10 Games
75
Last 5 Games
82
How many pitches does Roki Sasaki 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 Roki Sasaki 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
 
 
-13%
BAA vs LHP
2025
 
 
-8%
BAA vs LHP
2024
 
 
-100%
BAA vs LHP
2023
No Stats
BAA Batters K BB H 2B 3B HR
Since 2023vs Left .203 88 13 18 14 1 0 4
Since 2023vs Right .232 80 14 9 16 3 1 2
2025vs Left .215 81 12 15 14 1 0 4
2025vs Right .234 73 12 7 15 3 1 2
2024vs Left .000 7 1 3 0 0 0 0
2024vs Right .200 7 2 2 1 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
 
 
-6%
ERA at Home
2025
 
 
-11%
ERA at Home
2024
 
 
-100%
ERA at Home
2023
No Stats
ERA WHIP IP W L SV K/9 BB/9 HR/9
Since 2023Home 4.38 1.62 12.1 0 1 0 6.6 5.8 1.5
Since 2023Away 4.68 1.48 25.0 1 0 0 6.5 6.8 1.4
2025Home 4.38 1.62 12.1 0 1 0 6.6 5.8 1.5
2025Away 4.91 1.41 22.0 1 0 0 6.1 5.7 1.6
2024Home 0 0 0 0 0 0 0 0 0
2024Away 3.00 2.00 3.0 0 0 0 9.0 15.0 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 Roki Sasaki 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
1.09
 
K/9
6.3
 
BB/9
5.8
 
HR/9
1.6
 
Fastball
96.1 mph
 
ERA
4.72
 
WHIP
1.49
 
BABIP
.240
 
GB/FB
1.05
 
Left On Base
77.5%
 
Exit Velocity
84.0 mph
 
Barrels/BBE
7.4%
 
Spin Rate
1636 rpm
 
Balls Hit 95+ MPH
28.4%
 
Swinging Strike
8.4%
 
Prospect Rankings History
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Defensive Stats
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Recent RotoWire Articles Featuring Roki Sasaki See More
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More Fantasy News
Throws three sim innings Friday
PLos Angeles Dodgers
Shoulder
August 9, 2025
Sasaki (shoulder) tossed three simulated innings against hitters Friday at Dodger Stadium, Bill Plunkett of The Orange County Register reports.
Analysis
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Will face hitters this weekend
PLos Angeles Dodgers
Shoulder
July 31, 2025
Sasaki (shoulder) is scheduled to face hitters at the Dodgers' complex in Arizona this weekend, Fabian Ardaya of The Athletic reports.
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Not quite ready to face hitters
PLos Angeles Dodgers
Shoulder
July 29, 2025
Sasaki (shoulder) is expected to throw at least one more bullpen session before facing living hitters, per MLB.com.
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On track to face hitters next week
PLos Angeles Dodgers
Shoulder
July 23, 2025
Dodgers manager Dave Roberts said that Sasaki (shoulder) threw a 39-pitch bullpen session Wednesday and is on track to face hitters at the team's spring training complex next week, Sonja Chen of MLB.com reports.
Analysis
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Reaching 90 mph in bullpens
PLos Angeles Dodgers
Shoulder
July 20, 2025
Sasaki (shoulder) has been reaching 90 mph with his fastball in recent bullpen sessions, per MLB.com.
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Latest Fantasy Rumors
Toronto trying to add pool cash
PFree Agent
January 17, 2025
The Blue Jays are attempting to trade for international bonus pool money as they await Sasaki's decision, Shi Davidi of Sportsnet.ca reports.
Analysis
The Dodgers and Padres have been working to do the same thing, although San Diego reportedly has been informed it's out of the running to sign Sasaki. While the Dodgers remain the overwhelming favorites to land the Japanese hurler, the Blue Jays continue to do everything they can to put their best foot forward.
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