Fantasy Baseball: Starting pitcher sleeper and breakout picks for 2026
It’s key to any successful fantasy baseball season to correctly identify sleepers and breakouts. Below, Corbin Young breaks down two sleeper SPs and two breakout SPs. For more sleepers, go here; for more breakouts, go here.
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SLEEPER STARTERS
Ryan Pepiot, Tampa Bay Rays
Interestingly, Pepiot had one of his best seasons in 2025, pitching away from Tropicana Field. However, the draft market hasn’t valued him as highly as prospects and those with smaller samples. In 2023 and 2024, Tropicana Field ranked third in strikeout park factors and 25th in offensive park factor. When the Rays played in George Steinbrenner Field in 2025, they ranked eighth in offensive park factor and 14th in strikeout park factor.
Pepiot’s swinging-strike rate was at 13.5% in 2024, which dropped in 2025 (12.1%) with the ballpark change. His changeup leads his arsenal with a 15.4% swinging-strike rate in 2025, similar to his career average (14.5%). That aligns with the league-wide changeup swinging-strike average at 15.5%. Pepiot’s changeup generates an above-average vertical movement profile, leading to whiffs and weaker contact, specifically against left-handed hitters (.232 wOBA, .253 xwOBA) in 2025.
Besides Pepiot’s changeup, the four-seamer profiles as an above-average pitch based on movement profiles. Pepiot’s four-seam possesses over 19 inches of IVB (induced vertical break), compared to the league average of around 16 inches. That pairs well when a pitcher can generate tons of extension, which Pepiot tends to do, given his 77th percentile extension at 6.8 feet.
Pepiot lowered his four-seam usage to right-handed hitters in 2025 (42.6%), down from 2024 (57%). Unsurprisingly, the batted ball results declined in 2025 (.396 wOBA, .355 xwOBA) compared to 2024 (.290 wOBA, .283 xwOBA) against right-handed hitters. That coincides with the park factor changes in 2025, which could be noisy. Theoretically, Pepiot’s four-seam should fare well in Tropicana Field, since it’s a pitcher-friendly environment.
Pepiot throws an interesting slider that doesn’t drop much, but sweeps 6-7 inches toward his glove side over the past two seasons. That’s notable because Pepiot’s slider elicited a career-high in swinging-strike rate in 2024 (16.2%), down to 11.4% in 2025. For context, Pepiot’s slider possesses an above-average horizontal movement profile, which typically leads to more weak contact. We mention Pepiot’s slider because it’s the wild card that could help him against right-handed hitters.
Don’t sleep on Pepiot in the middle rounds because he possesses the stuff and home park upgrade that make him a palatable sleeper in 2026.
Reid Detmers, Los Angeles Angels
One of these days, Reid Detmers will prove the believers correct.
Jokes aside, Detmers fits the Kris Bubic mold of having success as a reliever, then rejoining the starting rotation with optimal results. Unfortunately, Detmers landed on the injured list in early September 2025 with elbow inflammation, which may have coincided with a 2 mph decrease in four-seam velocity. He has pitched in spring training, so we’ll want to monitor his health.
What’s to like about Detmers? It starts with the stuff. Detmers’ slider leads the arsenal with an above-average swinging-strike rate at 20.5% in 2025, up from a career average of 18%. With the additional four-seam velocity, we saw his swinging-strike rate increase to 14.7% in 2025 from 10.1% throughout his career.
Detmers’ four-seam generated over 18 inches of IVB in 2025, helping to create a rising effect on the heater as he peppered it high in the zone. Those tend to be optimal locations for a four-seamer with tons of IVB. Besides the four-seamer, Detmers’ slider movement profile supports the above-average swinging-strike rates because it’s a nasty gyro-like slide with tons of downward movement. The slider drops nearly 38 inches (37.8), five more inches of downward movement compared to the average.
Like other starting pitchers, Detmers relied more on his best pitch, the slider, especially to left-handed hitters. The slider usage went to 50.5% in 2025, up from 32.8% (2024) and 36.5% (2023) against left-handed hitters. That coincided with Detmers throwing fewer four-seamers (31.2%) and sinkers (6.9%), a 7-8-point drop for both against lefties in 2025.
The elbow issue might be the biggest concern, but Detmers’ spot in the rotation looks safe for now. Thankfully, Detmers’ draft price (191.3 ADP) hasn’t been increased to a level that adds risk, so it’s a low-risk, medium-reward bet for a starting pitcher sleeper.
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BREAKOUT STARTERS
MacKenzie Gore, Texas Rangers
MacKenzie Gore was the only starting pitcher with three pitches eliciting a swinging-strike rate at 18% or higher in 2025. That includes Gore’s slider (19.5%), changeup (20%) and cutter (18.8%). It’s worth noting that Gore introduced a cutter in 2024, which he primarily threw to right-handed hitters (6%) in 2025, as his fourth-most thrown pitch. It was a small sample of Gore’s cutters, but they were effective for whiffs against righties and weaker contact (.253 wOBA, .259 xwOBA).
Gore changed his pitch mix against left-handed hitters, showing he understands that he needs to throw his best pitch (slider) more often. That’s evidenced by Gore throwing his slider 44.3% of the time against left-handed hitters (2025), up from 4.9% in 2024. Historically, Gore relied heavily on the four-seamer against lefties in 2024 (52.3%) and 2023 (57.1%).
Gore’s pitch mix change against lefties should continue to be fruitful because hitters destroyed the four-seamer in 2025 (.451 wOBA, .387 xwOBA) and 2024 (.385 wOBA, .373 xwOBA). Theoretically, Gore’s four-seamer should generate more whiffs and better results, given the movement profile. Gore’s four-seamer has above-average induced vertical break (IVB) with elite extension (89th percentile).
That suggests Gore’s four-seam locations could improve since he tends to throw it in the zone too often. When Gore threw the four-seamer in the zone in 2025, it led to a 12.6% swinging-strike rate, .367 wOBA and .382 xwOBA. Unfortunately, that’s not much better than when Gore throws the four-seamer outside the zone (.364 wOBA, .371 xwOBA). That hints at Gore’s four-seamer being unable to elicit weak contact, partially because it lacks arm-side fade.
Thankfully, Gore likely knows that and continues to evolve his pitch mix to lower the four-seam usage. Besides the whiffs, Gore’s control can be an issue, with a 37% ball rate in 2025. The wild card in Gore’s favor involves the significantly better defense behind him on the Rangers. Last season, the Rangers’ team defense ranked first in defensive runs saved (DRS), while the Nationals (Gore’s former squad) ranked 27th. In Outs Above Average, the Rangers ranked sixth and the Nationals ranked 29th.
Gore should provide plenty of strikeouts and a potentially improved WHIP, which could be better than his career norm (1.40). If Gore posts a 1.25 WHIP, there will be tons of value in the improved team context in 2026, as a starting pitcher breakout. It’s a low-risk, high-reward draft selection.
Ryan Weathers, New York Yankees
Injuries have been a problem for Ryan Weathers, who hasn’t logged 100 innings throughout his five MLB seasons. In a small sample of 38 innings, Weathers posted a career-best swinging-strike rate (13.6%) after missing nearly 150 days (144) on the injured list for a strained forearm and lat strain. We saw Weathers’ four-seam velocity reach 96.9 mph in 2025, a career high. During an early spring training outing, Weathers threw his four-seam harder, averaging 98.5 mph against the Nationals.
It might be scary for a pitcher with an extensive injury history to be ramping up their velocity early in spring training. However, we know that increased velocity can be beneficial from a whiff and weak contact standpoint. Notably, Weathers’ changeup and sinker were thrown over 1.5 mph harder in his early spring training performance. Weathers made a pitch mix change by lowering his four-seam usage and bumping up sweeper usage. Monitor that adjustment, though it could be small-sample noise.
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The main concern for the changeup would be losing downward movement with the additional velocity. Theoretically, it could lead to fewer whiffs, especially to right-handed hitters. For context, Weathers’ changeup elicited a 20.7% swinging-strike rate, over five percentage points above the league average.
In Weathers’ spring training outing, he tinkered with throwing more sweepers, particularly to lefties (45%). Weathers threw sweepers 27.8% of the time in 2025, but we saw him experiment with heavy sweeper usage at 35.1% in 2024 against left-handed hitters. That would be an optimal approach because Weathers’ sweeper remains one of his best pitches, allowing a .221 wOBA (.153 xwOBA). Interestingly, the changeup was relatively effective against lefties (.250 wOBA, .184 xwOBA). Weathers threw his changeup more against left-handed hitters in 2025 (18.3%) across a small sample, up from 10.8% in 2024.
Weathers has been going past pick 200 as one of the final picks in drafts. Expect his ADP to rise, but the price bakes in the injury risk for a potential breakout season in 2026. The increased velocity, pitch mix change and improved team context support the upside scenario.