| Year | Level | G | IP | ERA | K | BB | WHIP | K/9 |
|---|---|---|---|---|---|---|---|---|
| 2023 | A/A+ | 18 | 72.0 | 3.25 | 89 | 28 | 1.17 | 11.1 |
| 2024 | AA/AAA | 22 | 108.1 | 3.48 | 134 | 41 | 1.17 | 11.1 |
| 2025 | AAA | 16 | 78.2 | 3.32 | 101 | 29 | 1.18 | 11.6 |
| 2026 ST | — | — | — | — | — | — | — | — |
The Most Electric Arm in the System. He Is Coming.
George Klassen is the brightest light in a depleted Angels farm system. A 97 mph fastball, an elite slider that generates genuine swing-and-miss, and an 11+ K/9 at every minor league level he has pitched. He was named to the 2025 All-Star Futures Game — the showcase game for the best prospects in baseball. The Angels know exactly what they have.
His spring debut on Feb 25 vs San Diego was the most dominant outing of camp: 2 innings, 3 strikeouts, 1 walk, 0 earned runs. That is exactly the audition the Angels needed to see — not to confirm his talent, which everyone already knows, but to confirm the transition from Triple-A to major league hitters is not going to be a wall.
The Angels cannot afford to mismanage this. They have a track record of bringing prospects up before they are ready or — equally damaging — keeping them down past the point where the development benefit has expired. Klassen's case is clear: AAA to start the season, 6–8 starts to confirm the command holds, MLB debut by mid-summer at the latest.