Angels fans received an opportunity to get a look at a potential building block on April 5, 2026. That’s because the team promoted pitcher George Klassen to the Majors. Klassen, one of the best prospects in the Angels’ system, was a strikeout machine in the upper Minors before his big league debut.

A Look at Klassen

Twenty-four-year-old George Klassen was one of two pitchers that the Angels received in 2024 when the team shipped Carlos Estevez to Philadelphia. Sam Aldegheri, the other, was considered closer to the Majors. However, Klassen had the higher upside.

The former University of Minnesota pitcher had a blistering fastball with the Phillies — and that pitch has largely helped Klassen push his way through the Angels’ farm system. Klassen was one of the best swing-and-miss pitchers in the Double-A Southern League, where he struck out 126 batters over 102 innings. He ultimately worked his way up to Triple-A, where he started this season.

From a pitch movement standpoint, Klassen’s fastball doesn’t have a ton of ride. He used that, as well as a running two-seamer, often in the spring. However, it does have good velocity, as Klassen can run it up to the high-90s.

Aside from the fastballs, Klassen has three secondary weapons to work. A changeup that sat in the high-90s, plus a harder, shortened-up curveball that sat in the low-80s. It’s one of two breaking balls, with the other being a hard gyro slider with good up-and-down action. That pitcher flirted with 90 MPH in the Minors.

Klassen didn’t get a lot of swing-and-miss off the slider (24% Whiff%) off that pitch in his lone 2026 start in Triple-A to date. However, he only threw three innings with Salt Lake.

Command is going to be a sticking point for the right-hander. Violent delivery for Klassen, who walked 47 total batters over 108.2 IP last season between Double-A and Triple-A.

The Angels officially promoted George Klassen on April 5.

Analysis

Klassen’s promotion to the Majors came on the heels of pitcher Ryan Johnson being scratched from his scheduled start due to illness. It prompted the Angels to give the high-octane right-hander a test drive at the big league level.

The 24-year-old is expected to be a major part of the Angels’ future. Klassen has the repertoire depth and stuff to be a big league starter — and a good one at that. And given how the Angels have had trouble in recent years finding consistent rotation depth, Klassen should be very important for some time.

We’ll see how long Klassen’s first big league stint lasts.

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