3 Key Takeaways From Connor Prielipp’s MLB Debut

Connor Prielipp’s long road to the majors finally led him to the mound, and his debut showed both why the Twins are excited and where there is still room to grow. The 25-year-old left-hander worked four innings, allowing two runs while striking out six and walking none. He generated 10 swinging strikes and leaned heavily on his best pitch, navigating a dangerous lineup that featured Juan Soto and Francisco Lindor.

After giving up a run on two hits in the first inning, Prielipp quickly settled in and retired the next eight hitters he faced. The early nerves were real, but they did not linger.

“I’ve been calm my whole life, so it’s really not been a big problem for me,” he said. “But yeah, that first inning, the noise, it’s loud, it’s hard.”

For a pitcher with limited professional experience and an extensive injury history, it was an encouraging first step. Beneath the surface, his debut revealed three key truths about his current profile.

The Slider Is Already a Weapon
Prielipp’s slider looked every bit like a big-league out pitch. He threw it 51% of the time and used it to rack up five of his six strikeouts. Hitters consistently chased it out of the zone, including seven whiffs on the pitch. Overall, it helped him to a 43.4% chase rate and a 35.3% strikeout rate for the entire game.

The pitch showed sharp break and late movement, diving below barrels even when opponents were anticipating it. That level of confidence in a secondary pitch is rare, especially in a debut. Prielipp didn't just show the slider. He relied on it, and it carried him through much of the outing.

Because he leaned on the pitch so heavily, it was also the one that took the most damage. Mets hitters produced a 62.5% hard-hit rate against his slider, with all four hits coming off it. Still, the expected slugging percentage was 165 points lower than the actual result, suggesting some of that damage may have come down to poor luck rather than poor execution.

New Pitches Begin to Take Shape
Another notable development was the use of his newer offerings. Prielipp mixed in both a curveball and a sinker, pitches he still considers recent additions to his arsenal. The sinker was introduced last season, while the curveball came out of a January pitching camp. The Twins were intentional about building his innings base before expanding his repertoire, and now those additions are starting to show up in games.

“We kind of wanted to get through the [2025] season before trying anything else,” said general manager Jeremy Zoll. “[The curveball is] showing really good promise. It’s showing good early results. That’s all, really encouraging.”

Neither pitch was a focal point in this start, but their presence matters. They give Prielipp more ways to attack hitters and could become critical as he faces lineups multiple times. This will be critical for him to stick as a starting pitcher.

Fastball Command Remains the Next Step
While the slider stole the show, Prielipp’s fastball still needs refinement. He topped out at 97.3 mph, but his command was inconsistent. Several fastballs missed high and out of the zone, limiting his ability to establish it early in counts. Some of that might have been nerves from making his debut, so it is something to monitor.

That said, the pitch does have some natural synergy with his slider. Elevated fastballs can change a hitter’s eye level before the breaking ball drops out of the zone. Still, to stick in a starting role, Prielipp will likely need to rely on it more and locate it more effectively.

His fastball was the lone pitch with a positive run value from his debut, but it had a 1.456 xSLG in limited use. With his current pitch mix, improving fastball command could be the key to unlocking another level of consistency.

A Debut That Means More
Prielipp’s journey to this point has not been straightforward. A 2022 draft pick out of Alabama, he has already undergone two Tommy John surgeries and entered pro ball with limited innings. That made his debut as much about perseverance as performance.

“Whenever someone goes through as much adversity as someone like Connor did,” said Zoll, “going through two rehabs without pitching in meaningful games in pro ball yet, you’re just always rooting for someone like that to get a chance.”

Now healthy, Prielipp is beginning to show why the Twins remained patient. The organization’s 2025 Minor League Pitcher of the Year is still something of a blank canvas, but the early returns are promising.

Four innings is only a snapshot, but it was enough to highlight a legitimate out pitch, a developing arsenal, and a fastball that could determine his ceiling. For a first impression, that's more than enough to build on.

What stood out about Prielipp’s debut? Leave a comment and start the discussion.