What the Data Reveals About Dean Kremer's Mysterious Turnaround With the Twins

Repeating the reading of his debut with the organization would mean falling into the small-sample trap. That first outing worked as a statistical relief, but this second start — delivered with authority against the Baltimore Orioles, his former team — demands a closer look at what is happening with Dean Kremer.

With his overall ERA reaching 5.93 this season and a recent history of severe punishment, pretending that a pair of spotless starts can erase the inconsistencies of an entire season would be just as reckless as ignoring what his advanced metrics reveal.

Modern baseball also does not allow us to rely solely on full-season projections. Pitchers adjust, teams find new ways to use their repertoires, and results can change when a new sequence emerges. In Kremer's case, the clue lies in what has happened to his pitch mix since joining the Minnesota Twins.

The most obvious change is the splitter. Kremer has stopped relying as heavily on a four-seam fastball that had been punished for a wOBA above .400 and has given much more room to a pitch that was already part of his repertoire.

The Anatomy of the Adjustment

To understand the scope of this rebound, we have to look at the breakdown of his 2026 season. His 5.93 ERA and alarming 2.63 home runs allowed per nine innings painted the picture of a starter paying too high a price for his mistakes.

However, his 4.54 xERA and 3.98 xFIP were already warning that some of the damage was worse than what several of his underlying indicators suggested.

The most obvious problem was his four-seam fastball, a pitch averaging around 93 mph that allowed a .409 wOBA along with a HardHit% above 38%.

When a pitcher begins to lose his margin with his fastball, every count that favors the hitter can become a problem. Minnesota found a way to reduce that dependence by changing the hierarchy of his repertoire.

Dean Kremer’s first start against his former team couldn’t have gone much better.

The former Oriole went 7.0 IP, H, ER, BB, 7 K against Baltimore, throwing 60 of 89 pitches for strikes. He also generated 6 groundouts, allowing just one hit. pic.twitter.com/KxWqLeJGdI
— Yirsandy Rodríguez (@Yirsandy) August 11, 2026

The splitter became much more prominent.

After using the pitch roughly 21% of the time in Baltimore, its usage with Minnesota jumped to 28.7%. The result? A .269 wOBA allowed, a .228 xwOBA and a 37.7% Whiff%, accompanied by just a 21.9% HardHit%.

The value of the splitter, which averages 82.6 mph, is not only in the velocity difference. Its vertical drop is much greater than the fastball's, allowing it to create meaningful separation on its way to the plate. That initial similarity between the two pitches forces the hitter to respect the fastball before realizing that the splitter will finish much lower.

That is where one of the reasons behind the adjustment appears.

If the fastball was no longer enough to control at-bats, Kremer needed another pitch that could use the same initial tunnel and take the hitter toward a different part of the zone. The splitter gives him some of that control.

It also gives him another weapon against left-handed hitters. By increasing its usage against that profile and taking it toward the bottom of the zone, Kremer can avoid some of the damage he was allowing when he relied too heavily on the fastball while generating more ground balls and fewer extra-base hits.

The Real Test

Minnesota Twins starting pitcher Dean Kremer (13). | IMAGN IMAGES via Reuters Connect

Two dominant outings are enough to raise an eyebrow. They are not enough to certify a permanent change for a pitcher who has carried inconsistencies through much of the season.

The real test for Dean Kremer is not shutting down his former team on an isolated night in August. It is determining whether this tactical adjustment can survive once hitters have more information about his new sequences.

That will be the difficult part.

The Orioles already know Kremer. Other teams will also have enough video and data to study how he is using the splitter with Minnesota.

If the pitch continues to generate swings and misses and weak contact while the fastball stops being the center of the damage, then these first two starts will have been more than a good stretch.

For now, that is exactly what Minnesota needs to find out.

Kremer arrived with a difficult season behind him and a fastball that had stopped giving him the margin he needed. Two starts later, the splitter is occupying a much more important place in his repertoire.

The sample is still small. The change, however, is already visible.

All statistics were verified using Statcast from Baseball Savant.

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