​Victor Vodnik’s season hasn’t come together in a straightforward way. He still averages 98.5 mph with his four-seam fastball and he induces ground balls at one of the top rates in the game. His slider has evolved into a legitimate weapon, and hitters have spent the year failing to push many balls into the gaps off anything he throws. Yet as of July 9, Vodnik carries a 5.72 ERA over 28.1 innings, has allowed 31 hits, and has issued 19 walks. That means he’s walked almost as many batters as he’s struck out, underscoring a clear struggle.
The more instructive takeaway is how the shape of those struggles has shifted. His recent improvement doesn’t look like a wholesale fix; it resembles a pitcher learning better ways to survive the problems that persist. The four-seamer, for instance, presents a paradox. Its average velocity sits in the 96th percentile, yet the pitch has produced only a 20.4% whiff rate and a 15.2% strikeout rate. Opponents are hitting .333 against it, though the .251 expected average and .386 expected slugging percentage imply the actual results have been somewhat harsher than the underlying quality of contact would suggest.
The movement profile helps explain why pure velocity hasn’t done the heavy lifting. Vodnik’s fastball features 12.6 inches of induced vertical break, which is 3.2 inches below the average for comparable four-seamers, and it also has less arm-side movement than its peers. This isn’t a fastball that combines elite speed with elite carry. It’s fast, but its shape is ordinary. That places a premium on location and sequencing: when Vodnik commands it, the velocity can still overpower hitters; when he misses, they’re generally able to put it into play.
The most encouraging development of Vodnik’s season is his slider. He has boosted its usage from 12.8% in 2025 to 26.9% this year, and hitters have managed only a .174 average and a .217 slugging percentage against it. The pitch has yielded a 36.2% whiff rate, a .179 expected average, and a .214 expected slugging percentage. It’s also his only positive pitch by run value. Vodnik’s slider isn’t a sweeping breaker; at 88.5 mph it has merely 2.3 inches of glove-side movement, less than typical sliders. Its defining trait is depth: it drops nearly five inches more than comparable pitches. The shape remains compact before it drops late beneath the barrel.
This isn’t a brand-new pitch in isolation—the spin direction, active-spin rate, and overall movement were similar last season. It’s about being a touch harder, but more importantly, it reflects greater trust. Vodnik has doubled his slider usage and has let the slider organize more at-bats. That trust is most evident in the recent sequences. On July 2 against the Miami Marlins, he threw seven sliders and five fastballs, using the breaking ball to generate three balls in play that were effectively harmless. On July 5 against the San Francisco Giants, he leaned on the slider for 40% of his pitches and used it to shape outs in situations where the fastball could have left him exposed.
In short, Vodnik’s season is defined by a mismatch between raw velocity and effective movement, and by a strategic pivot toward a more slider-heavy approach that is beginning to pay dividends. The four-seamer remains a work in progress, with velocity that can overwhelm but a movement profile that doesn’t consistently produce elite results unless located perfectly. The slider, by contrast, has emerged as the centerpiece, providing a credible miss rate, a solid run value, and a growing command that helps him navigate through the innings. If Vodnik can continue to refine the fastball’s placement while maintaining the slider’s uptick in usage and trust, he could transform the current rough stretch into a more sustainable, higher-impact profile.