| Year | Level | G | IP | ERA | K | BB | WHIP | K/9 |
|---|---|---|---|---|---|---|---|---|
| 2023 | AA/AAA | 38 | 54.0 | 3.83 | 60 | 32 | 1.70 | 10.0 |
| 2024 | AAA/MLB | 41 | 52.1 | 4.30 | 57 | 35 | 1.72 | 9.8 |
| 2025 | MLB | 28 | 29.2 | 4.55 | 32 | 22 | 1.75 | 9.7 |
| 2026 ST | — | — | — | — | — | — | — | — |
The Arm Is Real. The Walks Are Also Real.
Ryan Zeferjahn's spring debut on Feb 23 — 1 clean inning, no hits, no runs against Texas — is the version of him that makes scouts interested. At 6'6" with legitimate raw stuff, he can miss bats when the command is on. The problem is the command being on is not a consistent event.
A 1.75 WHIP in 2025 with 22 walks in 29.2 innings is not a command issue that can be coached away with a mechanical tweak. It is a persistent pattern that has followed him from the minors to the majors. Low-leverage work only until something changes — either mechanically or through a breakthrough in how he attacks the strike zone.
The upside is real and worth tracking — a 6'6" reliever who misses bats and holds 95+ mph has a profile that develops late sometimes. But the Angels need useful bullpen arms now, and Zeferjahn's walk rate makes him a liability in any situation where a free pass is consequential. Low leverage, close monitoring, and patience.