I’ve been fascinated by the thought of mirror picture twins because the Giants signed Taylor Rogers final December, pairing him up together with his brother Tyler and illuminating me to their uncommon genetic connection. As monozygotic (i.e., equivalent) twins, they arrive from the identical fertilized ovum and, thus, the identical DNA. Taylor, nonetheless, is left-handed, and Tyler is right-handed, a manifestation of their mirror picture relationship.

Mirror picture twinship makes for an ideal metaphor, and as a author, nothing excites me extra. It’s like a real-world instance of a contronym, a phrase that may have two reverse meanings in several contexts; the phrase “dusting” at all times seems to be the identical, however generally it means to take away mud, and different instances it means to sprinkle it on. It’s the identical factor with the Rogers twins. They give the impression of being precisely the identical till they take the mound.

Taylor Rogers relieving Tyler Rogers at the moment.

Hitters be seeing this… ? pic.twitter.com/5Tyq6S3RTD

— Rob Friedman (@PitchingNinja) July 16, 2023

The alternative handedness may be ascribed to genetics; the submarine factor, not a lot. However that’s why the Rogers brothers are so fascinating. Their mirror picture relationship goes past heredity. From a field rating or the again of their baseball playing cards, they’re virtually indistinguishable. Each pitchers predominantly depend on a sinker and slider/sweeper, and with that two-pitch combo, they’ve earned comparable leads to 2023:

However they’ve taken two fully completely different paths to achieve these outcomes. Whereas they work with the same arsenal, Taylor at all times leads together with his sweeper; Tyler leans on his breaking ball in opposition to same-handed hitters and his fastball in opposition to lefties. Taylor, the elder Rogers twin by 30 seconds, additionally throws his pitches with a lot greater velocity and a a lot greater arm angle. His objective is to rack up strikeouts, however his ever-so-slightly youthful brother pitches to induce weak contact:

The identical, but fully completely different. It’s a enjoyable relationship to find. And the Rogers brothers aren’t the one mirror twins in Main League Baseball, even when they’re, technically, the one mirror picture twins in Main League Baseball. Certainly, one other charming pair of pitchers is exhibiting off what makes them so comparable and but so completely different, they usually’re doing so on a a lot greater stage: Spencer Strider and Justin Steele.

Steele and Strider don’t look a lot alike. They had been born on completely different days, in several years, in several cities to completely different moms. But, in some ways, they’re twins. They sit beside each other on the NL WAR leaderboard and the NL Cy Younger projector, trailing solely Zack Wheeler on the previous and Blake Snell on the latter. They’re the one two certified NL starters with a FIP beneath 3.00 and a profitable proportion above .750. I might additionally argue they’ve been the 2 most compelling pitchers to observe within the NL this season. Snell’s efficiency has been a sight to behold, however all of the underlying numbers counsel he’s pitching over his head. In the meantime, Wheeler has simply been traditional Wheeler, and Logan Webb seems to be like typical Webb. In distinction, Steele has damaged out as a bona fide ace, surpassing all preseason expectations, and Strider is proving his dominant rookie season was no fluke.

On the floor degree, Strider and Steele have comparable arsenals and approaches. Every is basically a two-pitch pitcher, main with a four-seam fastball and complementing the heater with a slider. They each dial up their slider utilization once they have the higher hand, both with two strikes or the platoon benefit. What’s extra, they find their pitches similarly, albeit in a mirror picture of each other. Strider, the righty, is pictured on high; Steele, the lefty, is down beneath:

Throughout every of their prospect days, most evaluators noticed Strider and Steele as potential relievers as a consequence of their restricted arsenals. Every has performed round with extra pitches, too, particularly in opposition to opposite-handed hitters, however they’ve finished their finest work by leaning on their finest pitches. Maybe they’re extra predictable than most beginning pitchers, however nonetheless, they know learn how to make opposing hitters play proper into their fingers. Every has a swing price of about 52% in opposition to his slider and 54% in opposition to his fastball. That places them first and second within the NL in whole mixed swings in opposition to the 2 pitches; nobody else comes inside 300 swings of Steele or 400 of Strider. General, just one certified NL pitcher, Sandy Alcantara, has a better swing price.

However relating to the outcomes of these swings, that’s the place the similarities finish. Strider goals for swings as a result of he desires swings and misses. He’s an influence pitcher by way of and thru, with 93rd-percentile fastball velocity, a 99th-percentile whiff price, and a 99th-percentile strikeout price. We reside in a strikeout-heavy period, and nobody embodies the zeitgeist fairly like Strider. He’s the one pitcher in historical past to report 200 strikeouts in his first 130 innings of the season, and he’s already finished so twice in his two-year profession. His stroll price, dwelling run price, and hard-hit price are all respectable however unspectacular; strikeouts are the spine of his recreation.

Steele, however, induces swings so he can generate groundballs. He has each one of many 5 highest groundball charges and one of many 5 lowest fly ball charges amongst NL starters, giving him the third-highest GB/FB within the league. He stands in stark distinction to Strider, who has the bottom groundball price and the very best fly ball price on the Senior Circuit. Steele isn’t a wizard at limiting exhausting contact, however since his common launch angle is so low, he leads all certified pitchers with a 5.2% barrel price, and he boasts the bottom dwelling run price within the NL. For the southpaw, his strikeout price is respectable however hardly spectacular as his stroll price ranks within the 93rd percentile.

Strider and Steele accomplish such completely different targets with such comparable approaches due to how completely different their particular person pitches are; their four-seams and sliders are alike in title solely:

Strider challenges batters with a blistering quick four-seamer that appears even quicker because of his 93rd-percentile extension. He makes use of backspin to induce a rising impact, tricking his opponents into swinging underneath the pitch. Then there’s his slider, which is so exhausting to hit due to how effectively it performs off his fastball. The 2 choices look comparable out of his hand however are available in at wildly completely different speeds in wildly completely different areas. By itself, his slider doesn’t seem to be it ought to be so devastating, but it’s been one of many least hittable pitches within the recreation; solely Kodai Senga’s forkball has a better whiff price (min. 400 pitches). After they do make contact, opposing batters can hit Strider fairly exhausting and fairly far, however that entire “making contact” factor is simply so rattling robust within the first place.

In the meantime, Steele’s four-seamer is so uncommon that a number of individuals have in contrast it to a cutter or a sinker as an alternative. Certainly, he can throw the identical pitch with two completely different motion profiles relying on the place he desires it to finish up. His slider isn’t as completely different from his fastball as Strider’s, however he throws it with a lot glove-side motion that batters battle to get the barrel on the ball. His whiff price isn’t as excessive, however his xwOBA on contact is way decrease; amongst certified NL starters, solely Miles Mikolas has a decrease xwOBAcon on sliders.

Because the cherry on high of the Strider/Steele comparability, every ace’s distinctive fashion makes him splendidly well-suited for his respective groups. Atlanta’s greatest asset on protection is catcher Sean Murphy, the most effective pitch framers within the recreation. His backup, Travis d’Arnaud, isn’t any slouch both. This offers Strider extra freedom to play within the shadow zone, the place he induces a ton of chases and misses. The Cubs, however, boast the most effective infield defenses within the recreation, excellent for a groundball-heavy pitcher like Steele. His .223 BABIP on groundballs is 20 ticks beneath league common, however with gloves like Dansby Swanson, Nico Hoerner, and Nick Madrigal behind him, that’s no coincidence.

Steele and Strider have comparable arsenals however completely dissimilar pitches. These pitches result in totally completely different outcomes but comparable total outcomes. Two pitchers, alike in dignity, however completely different as day and night time. They could be completely different sizes, completely different ages, and, you realize, two fully unrelated people, however all the identical, Spencer Strider and Justin Steele are mirror picture twins.