Landen Roupp leans heavily on his high-spin curveball, and Hayden Birdsong is a purveyor of the kick-change. Both pitches profile as plus, which is a big reason the right-handers are being counted on to provide quality innings in their respective roles with the San Francisco Giants this season; Roupp is in the rotation, while Birdsong is working out of the bullpen.
The early results have been promising. The 26-year-old Roupp, who is scheduled to make his second start on Tuesday night against the Cincinnati Reds, made his season debut on April 2 in a 6-3 Giants win over the Houston Astros. The start wasn’t great — he was removed with the bases loaded and nobody out in the fifth inning and was ultimately charged with three runs — but his eight strikeouts were encouraging. Seven of those strikeouts — and none of the four hits he allowed — came against his curveball. He threw his signature offering 34 times in his 83-pitch effort.
Birdsong has thrown four scoreless innings over two relief appearances. One of his four strikeouts has come courtesy of the kick-change, which he has thrown nine times out of 53 total pitches. The 23-year-old, likewise in his second big league season, has primarily attacked hitters with his high-octane heater (56.6% usage).
The stories behind Roupp’s hook and Birdsong’s changeup? I broached the subjects with the right-handers in Giants camps shortly before the start of the regular season.
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“I’ve thrown it my entire life,” Roupp of his curveball. “All that’s really different is that I’m getting stronger with more mobility, and learning about the metrics. In college we didn’t have metrics. So, learning ways to make it move more and spin harder… learning and growing into my body has made it a lot better. For me, having confidence in it is the biggest thing.”
A 12th-round pick out of UNC-Wilmington in 2021, Roupp spun his curveball at 3,056 rpm in his April 2 outing, comfortably within the 2,900-3,100 range he’d described to me. Roupp also said that he “gets about 19 to 22 [inches] of horizontal [movement] and something like negative-11 vert” when he is executing properly. Timing is the key. When he’s out of sync with his delivery it doesn’t come out of his hand exactly as he’d like. Picking up a baseball, Roupp showed me his two-seam fastball grip, then rotated the ball just slightly. He explained that he throws his curveball just like his two-seamer, but “with a snap.”
Roupp’s curveball is “pretty slow,” averaging 77.4 mph since the start of last season. He said the speed differential between that and his fastball — his two-seamer averages 93.4 mph — is a big part of its effectiveness. As for its usage, he threw the curve 41% of the time in his first outing, which was slightly less frequently than he did last season (44.1%). With the caveat that one game is nowhere near a large enough sample size to determine what a pitcher’s usage rates will be, that dip was notable given that Roupp told me this spring that his plan was to throw his curve less often this season.
“Coming up through the minor leagues, they were telling me I was throwing it too much,” Roupp said. “That was more about developing my other pitches, though. But while I might throw it 40% of the time, I do think I’m going to lean back a little bit now that I have the changeup and the cutter. The changeup was new last year, and the cutter this year. I want to implement those and get people off my curveball so that it’s even more effective at the big league level.”
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“I have a high-vert heater with pretty good velo,” Birdsong said when asked to describe his full arsenal. “My curveball is the opposite of my fastball in that it’s just straight down; it’s negative-15 vert when it’s good. My slider is kind of in development and is more of a cutter. My changeup is just my changeup. I started throwing it last year, and it’s developed into one of my better pitches.”
That would of course be the kick-change. The right-hander supposedly learned it at Tread Athletics… except, that’s not true. Birdsong explained that while “everybody says that,” he’s never been to Tread, nor has he talked to anyone who works there. He simply watched a Tread video, then began experimenting with the grip the following day.
“I started playing catch with it — this was in spring training — and I’m not sure I can even remember who my catch partner was,” said Birdsong, whom the Giants took in the sixth round of the 2022 draft out of Eastern Illinois. “It might have been Spencer Bivens. But my changeup had been horrible the year before. It was basically just a bad fastball, a 15-vert slower fastball. That’s all it was. I needed to find another grip, one that wasn’t a splitter — I didn’t want to mess with one of those — so I started looking at videos. That one popped up.”
Birdsong’s previous attempts to find a quality changeup had all been for naught, but when he saw the kick-change, he thought, “Let’s try it.” To his knowledge, he’d never thrown one “under nine vert.” All of a sudden, he had one that was close to zero. The first coach he approached with that news didn’t believe it.
“I was throwing it, and it was tumbling,” Birdsong said. “It was doing what I wanted it to do. I told [bullpen coach Garvin Alston] that I’d thrown a changeup in the bullpen and it was negative vert. He goes ‘No.’ Then he was like, ‘Let me go take a look [at the data].’ I asked him about it the next day and he said, ‘Keep throwing it.’”
As Davis Martin and Matt Bowman explained here at FanGraphs last September, the pitch that Birdsong is now throwing has a close-cousin relationship with the better-known split change. While the name is new, the pitch itself really isn’t.
“I saw the video and called it a spike change,” said Birdsong. “I showed the grip to somebody — I forget who it was — and he was like, ‘Yeah, there are some guys who used to throw that. It’s called a kick-change.’ All it is, really, is that you’re kicking the axis of the ball. Whatever you call it, it works for me.”
