Roki Sasaki threw seven innings against the Angels on May 17, allowing one earned run on four hits, issuing no walks and striking out eight while generating 18 whiffs and earning the win.
The raw line—7.0 IP, 1 ER, 4 H, 0 BBs, 8 Ks on 91 pitches—was the headline. Behind it were the metrics that made the outing feel like something different: a 34% called-strike-plus-whiff (CSW) rate for the night, 18 total whiffs, and a fastball that Pitcher List said showed three inches of extra horizontal ride. Pitcher List also reported Sasaki’s slider produced seven whiffs on 25 swings and posted a 44% CSW, and that his fastball was thrown in the zone at an 84% clip. Sports Illustrated called the seven-inning start the best outing of his MLB career.
Nick Pollack of Pitcher List summed up the start bluntly: "We’ve been waiting a long time for Roki Sasaki to give us a performance worthy of our attention and he delivered Sunday against the Angels: 7.0 IP, 1 ER, 4 Hits, 0 BBs, 8 Ks – 18 Whiffs, 34% CSW, 91 pitches (W)." Pollack added, "That’s legitimate growth," and warned it was still early to declare the development permanent: "I won’t rule out the possibility that Sasaki has finally begun to emerge into a fantasy-relevant arm."
The outing also stood out for command. Sasaki did not issue a walk, and Pitcher List recorded a 75% strike rate and an overall zone rate figure that night among the metrics compiled. Sports Illustrated noted this was the first time Sasaki had pitched into the seventh inning this season and that he had a 5.09 ERA across eight starts before the Angels game.
There is a clear line from spring to this moment. Pitcher List reported that the spring focus, beginning in March, was on adding a slider to give Sasaki a reliable breaker to pair with his fastball and splitter. That change appears to have paid off in one start: the slider’s whiffs and the fastball’s added ride gave batters two distinct challenges. Pitcher List also observed that Savant began classifying many of Sasaki’s splitters as a forkball, a change the writer did not view as a major step forward on its own, but the combination of pitches on May 17 read differently.
The tension is straightforward: before this night Sasaki had struggled with consistency. Sports Illustrated reported some voices had even suggested the Dodgers should demote him after a rough spring and an uneven regular season. The same Sports Illustrated piece also said the Dodgers have continued to support Sasaki through his struggles. That support, and Sasaki’s ability to avoid walks while getting whiffs, is the friction point—can this one polished start be the start of sustained improvement or an outlier in a rocky season?
Angels first baseman Nolan Schanuel, who faced Sasaki that day, offered unambiguous praise: "He’s got good stuff," "He came in and threw strikes," "He’s figured it out," and, describing the look, "His fastball had good run, good ride, and then when he threw that splitter and it matched plane with the fastball, it was hard to tell the two apart," finishing, "He just came and threw his best today." Those comments underscore how convincing the outing looked to hitters who saw it up close.
If anything follows from the facts on hand, it is this: May 17 was the clearest evidence yet that adjustments—chiefly the added slider and improved fastball command—can change Sasaki’s profile. The next, decisive act will be whether he can repeat the control (zero walks), produce similar whiff rates with his slider and fastball, and string together another start like this. If he does, then Pollack’s line—"That’s legitimate growth"—will start to look like more than cautious optimism.
