Mark J. Rebilas-Imagn Photos
Although Roki Sasaki’s cope with the Dodgers wasn’t anyplace near the winter’s largest, few free brokers have been so coveted or got here with as a lot hype hooked up. Referred to as “The LeBron James of Japanese baseball” for his exploits in highschool, he was dominant — even transcendent — throughout his 2021–24 NPB run with the Chiba Lotte Marines. As he went by the posting course of, his mixture of youth and a tantalizing repertoire that includes an elite, 80-grade splitter in addition to a fastball with triple-digit velocity generated widespread curiosity by groups, although a dip in that velo final yr did charge as a trigger for concern. Now, eight begins into his profession with the Dodgers, the 23-year-old righty has been underwhelming, and now he’s damage, too. On Tuesday, the staff positioned him on the 15-day injured record on account of a shoulder impingement, persevering with the dizzying degree of turnover throughout the rotation of the NL West leaders.
That is the most recent flip in what’s been a rocky rookie season for Roki. By way of 34.1 innings — about 4 1/3 per begin — he’s carrying a 4.72 ERA, a 6.16 FIP, and a 6.13 xERA. He’s struck out simply 15.6% of batters, whereas strolling 14.3% (the very best mark of any pitcher with not less than 30 innings), and has served up 1.57 homers per 9. His 21.9% chase charge is the third-lowest at that 30-inning cutoff.
Batters have struggled to do something with Sasaki’s splitter, which he’s thrown within the zone simply 29.6% of the time; they’ve chased it 30.4% of the time, and general have hit .137 and slugged .237 in opposition to it. Even so, his 35% whiff charge on the pitch is properly off the 56.5% whiff charge it generated final yr in NPB in accordance to Sports activities Information Options. Batters have fared higher in opposition to his slider (.250 AVG/.417 SLG, 33.3% whiff) and his four-seamer (.253 VG/.494 SLG, 10.1% whiff), hardly ever chasing both (14% of the time for the previous, 15% for the latter). All six of his dwelling runs allowed have been off of four-seamers, as have two would-be homers robbed by Andy Pages; his xSLG on that pitch is a worrisome .663. His 17.8% whiff charge on four-seamers within the higher third of the strike zone or greater is healthier, however batters have nonetheless slugged .692 on pitches there, with a .903 xSLG.
The Dodgers have stored Sasaki on a brief leash, permitting him to throw not less than 90 pitches simply twice, with a excessive of 98 on Might 3 in opposition to the Braves, however a part of the explanation for his restricted workload is that he’s hardly ever pitched properly sufficient to benefit working a lot deeper into video games. That seemed to be the case final Friday, when he made the worst begin of his transient huge league tenure in opposition to the Diamondbacks at Chase Discipline. In four-plus innings, he threw simply 61 pitches however allowed 5 runs and two homers, each season highs. For the primary time this yr, he didn’t strike out a single batter. His whole of 4 swinging strikes was additionally a season low, and his 94.8 mph common four-seam fastball velocity was 1.2 mph beneath his season common.
Sasaki started the fifth inning by strolling Ketel Marte after a seven-pitch battle, and was charged with the run after reliever Anthony Banda served up a game-tying grand slam to Lourdes Gurriel Jr. later within the inning. The Dodgers finally gained the back-and-forth slugfest — which included seven homers and squandered leads of 8-3 (by the Dodgers) and 11-8 (by the Diamondbacks) — because of a six-run ninth inning that was capped by Shohei Ohtani’s three-run homer.
“We turned conscious of this after his final begin in Arizona,” mentioned supervisor Dave Roberts on Tuesday concerning Sasaki’s shoulder troubles. “From what we collect, he’s felt some discomfort for the previous couple of weeks, however given the place we’re at as a pitching employees, he wished to proceed to go and persevere and struggle by all the pieces till his efficiency was going to be compromised. In order that’s when he tell us the place he was at bodily.”
Ugh. It’s an all-too-familiar story: A pitcher combating by discomfort out of concern for the overall state of his employees has solely exacerbated each his situation and that of the staff. Roberts added that Sasaki suffered related shoulder soreness final yr whereas being restricted to 18 begins and 111 innings in Japan.
The Dodgers found the impingement after sending Sasaki for an MRI, and have shut him down indefinitely. “We made it very clear to Roki that there isn’t a expectation on timeline,” mentioned Roberts. “The primary factor is that he’s wholesome, he’s robust, his supply feels good, then he’ll pitch for us.”
Understanding that Sasaki has been pitching at lower than full well being for a while helps to elucidate his unremarkable efficiency, notably in relation to his flagging velocity. Provided that he averaged 98.3 mph together with his four-seam fastball in 2022, and 98.9 in ’23 — and has been clocked as excessive as 103 — the baseball world has been ready to see him summon elite warmth. But he’s reached 100 mph simply twice, and 99 simply six occasions. The truth is, his 13 quickest pitches, all 98.4 mph and above, have been all thrown in his March 19 main league debut in opposition to the Cubs in Tokyo, when he walked 5 however allowed only one hit and one run over three innings. The Case of the Lacking Velocity — he’s averaged simply 95.7 mph together with his four-seamer in his seven begins since his debut, and was beneath 95 in three of his final 4 turns — has since confounded the Dodgers.
Certainly, the Case of the Lacking Velocity was mentioned to be a crucial aspect of groups’ pursuit of Sasaki, whose common four-seam velo dipped two ticks to 96.9 final yr, in accordance with SIS, and whose stuff was typically down when Eric Longenhagen checked in final August. As The Athletic summarized, “He requested every potential employer to elucidate the explanation behind a vexing challenge that lingered over his last season earlier than a long-anticipated leap to the majors: Why did his velocity fall off?” The pitcher wished every staff he met with to current its evaluation not solely so he might acquire perception into the problem however to know their strategy to conveying data — an project that rankled some groups. Within the view of 1 decision-maker, he was “asking for some issues that get past that line of proprietary.”
For Sasaki, the problem is that he wants that high-end velocity as a result of his heater has below-average spin (simply 2,080 rpm) and vertical break (14.3 inches of induced motion, 1.6 inches beneath common), so it’s flatter and straighter than most, missing in deception. It’s simpler to hit except it’s actually buzzing.
Examine that vertical break to what we noticed within the 2023 World Baseball Basic. From The Athletic’s Eno Sarris final November:
Sasaki had 17-plus inches of induced vertical motion and 13 inches of horizontal motion within the WBC. At 98-plus mph, his fastball comps to these numbers are hard-throwing relievers like Kansas Metropolis Royals nearer Lucas Erceg and New York Mets setup man Ryne Stanek, and perhaps Hunter Greene amongst starters. At 96-plus, the comps are rather less thrilling: Cleveland Guardians starter Gavin Williams and reliever Yimi García have some commonalities with their fastballs. And, in accordance with Lance Brozdowski, Sasaki additionally misplaced a few inches of experience on the fastball in 2024 in Japan. It’s a very good fastball both method, however there are some indications it’s transferring within the incorrect course.
“The speed permits for that margin of error,” mentioned pitching coach Mark Prior just lately. “And clearly, that’s not there (proper now).”
Sasaki’s command and site are points as properly. “I feel guys are on his fastball as a result of it’s the one factor that’s in all probability within the zone greater than something,” mentioned Prior. “This goes again to his capacity to throw the opposite pitches for strikes, and be capable to combine, in all probability steadiness with all three.”
Even within the restricted information Sasaki has produced — round 300 four-seamers thrown — the outlines of the development are clear. Batters do significantly better in opposition to his fastball based mostly on its velocity:
Roki Sasaki by 4-Seam Fastball Velocity
Velo
%
PA
HR
Hor
Vert
AVG
xBA
SLG
xSLG
wOBA
xwOBA
Whiff%
Brl%
HH%
>97
23.2%
18
1
11.1
14.4
.133
.267
.333
.461
.281
.378
16.2%
7.7%
46.2%
95–97
55.0%
57
1
10.6
14.2
.267
.265
.333
.455
.355
.388
9.4%
7.7%
51.3%
<95
21.9%
24
4
9.8
14.6
.261
.388
.826
1.137
.465
.631
5.9%
30.4%
60.9%
SOURCE: Baseball Savant
Hor = horizontal motion in inches (arm facet). Vert = vertical break in inches (with out gravity).
I couldn’t match all the pieces I wished to suit into that desk, however given these numbers, it’s not stunning that the common launch angle decreases with the pitch velocity, from 19 levels for the slowest bucket to 12 for the center and 5 for the quickest.
That is all an issue given his velocity development:
The situation of Sasaki’s shoulder isn’t the one potential issue slicing into his velocity, because the staff has mentioned him dialing it again a bit in an effort to enhance his command. In response to Prior, “clearly some supply issues” are contributing as properly.
Our two pitch modeling methods regard Sasaki’s splitter as glorious, however they’ve been largely unimpressed together with his general arsenal and notably his four-seamer, with PitchBot grading it at 44 on the 20-80 scouting scale (50 is common) and Stuff+ grading it at 78 on a scale the place 100 is common. The four-seamer not less than has the most effective command/location grades of his three pitches:
Roki Sasaki through PitchingBot and Stuff+
bot Stf FA
bot Cmd FA
botStf FS
bot Cmd FS
botStf SL
bot Cmd SL
botStf
botCmd
botOvr
44
45
75
35
43
29
57
34
37
78
99
110
85
90
84
91
92
85
It shouldn’t be a shock that his stuff has typically been trending downwards:
Past the efficiency points, Sasak’s harm comes at an inopportune time, as a result of three-fifths of the Dodgers’ season-opening rotation is now on the shelf. Blake Snell made simply two begins earlier than being sidelined as of April 6 on account of shoulder irritation. The Dodgers initially hoped he would miss simply two begins, however after throwing a bullpen session on April 19, his subsequent session was scrapped as a result of he felt discomfort whereas enjoying catch. He acquired an MRI at that time, in addition to a cortisone injection. After additional delays on account of continued discomfort, and a go to to Dr. Neal ElAttrache, he was lastly capable of resume enjoying catch on Wednesday.
Tyler Glasnow, who left his fifth begin of the season after one inning on April 27 on account of shoulder discomfort, is the opposite member of the unique 5 on the IL. He too was recognized with shoulder irritation, however was capable of resume enjoying catch on Sunday, and the hope is that he might return later this month. “Tyler began a throwing development,” mentioned Roberts on Tuesday. “He’ll proceed to work towards a bullpen, and we’ll have a extra clear image later this homestand. However he has began throwing a baseball.”
The three accidents go away Yoshinobu Yamamoto and Dustin Might the one members of the season-opening rotation who’re nonetheless wholesome. Yamamoto has been stellar, although after posting a 0.90 ERA by his first seven begins, a five-run, five-inning drubbing by the Diamondbacks doubled that to 1.80, and after Wednesday’s six-inning, three-run begin in opposition to the A’s, he’s as much as 2.12, although that’s nonetheless good for third within the NL. Although 51 innings, he’s fifth within the league in strikeout charge (29.6%) and eighth in FIP (3.06) as properly. Might, who missed most of 2023 and all of ’24 on account of Tommy John surgical procedure after which an esophageal tear, has posted a 4.08 ERA and three.96 FIP by seven begins totaling 39.2 innings. Whereas these numbers aren’t excellent, he’s gone not less than 5 innings in all seven begins, no small contribution for a staff whose rotation ranks final within the majors in innings (198.1).
Certainly, as with their championship run final October, the Dodgers have just lately resorted to bullpen video games to fill the cracks of their rotation; Jack Dreyer has made two such begins and Ben Casparius one, all since April 23. Landon Knack has made 4 begins and has been tagged for a 6.61 ERA and 4.88 FIP, which is not less than higher than Bobby Miller, who was tagged for six runs in three innings in his lone begin earlier than being optioned again to Oklahoma Metropolis as shortly as he’d arrived.
Not all is doom and gloom, nevertheless. Tony Gonsolin, who missed all of final season on account of Tommy John surgical procedure after which opened this one on the IL on account of a again harm, has pitched successfully in his first three begins, placing out 21 and strolling simply 4 in 16 innings whereas posting a 2.81 ERA. Clayton Kershaw, who made simply seven begins totaling 30 innings final yr, then underwent a pair of offseason surgical procedures to restore a torn meniscus in his left knee and a ruptured plantar airplane in his left foot, will make his 2025 season debut on Saturday. He’s made 5 rehab begins at three completely different ranges since April 16, throwing as many as 66 pitches. When he returns, he’ll resume his countdown to turning into simply the fourth southpaw to achieve 3,000 strikeouts, after Steve Carlton, Randy Johnson, and CC Sabathia.
Given the cash they spend and the success they’ve had, no person could have a lot sympathy for the Dodgers, notably when it appears as if each pitcher of theirs is out of the blue at greater danger for harm. Nonetheless, given the fanfare and promise of Sasaki, it’s a bummer to see him battle. Right here’s hoping his shoulder heals, and that sooner or later we get to see what the fuss was all about.
