Blake Treinen Is Flashing Dominant Stuff — And Almost Nobody Has Noticed

Blake Treinen has posted a 0.00 ERA across his last 7.7 innings with a 33.3% strikeout rate over the past week, and he's sitting on just 2% roster ownership. The numbers are screaming. The question is whether you're listening.

The Signal Shift

WaiverScout first flagged Treinen back on April 7th — at 0.6% ownership — and classified him as a deprioritize. The rationale was sound at the time: the data wasn't there yet. But here's what's happened since: Treinen has sharpened his arsenal and the underlying skills have caught up in a meaningful way. His K rate has jumped from 29.0% over the trailing 30 days to 33.3% in the last seven days, and his FIP has cratered to a stunning 1.60 over that same stretch. This is no longer a pitcher to ignore. The signal has upgraded from noise to early conviction.

Rolling Window Breakdown

The trend lines across Treinen's rolling windows tell a clear story of a reliever tightening the screws:

  • 7-day: 0.00 ERA, 13.5 K/9, 1.60 FIP in 2 IP
  • 14-day: 0.00 ERA, 7.66 K/9, 3.31 FIP in 4.7 IP
  • 30-day: 0.00 ERA, 10.52 K/9, 2.32 FIP in 7.7 IP

That 14-day FIP of 3.31 was the soft spot — and it's been completely overwritten by recent dominance. The K/9 leap from 7.66 to 13.5 over the past week is the kind of spike that suggests a mechanical or pitch-mix adjustment clicking into place, not random variance. The zeroes across every ERA window are eye-catching, but the FIP compression — from 3.31 to 1.60 in a week — is the real story. That tells you the strikeouts are genuine and the contact quality against him is minimal.

The Ownership Window

At 2% rostered with a +1.4% move over the past week and ownership velocity trending up, the window to act is still wide open — but it's narrowing. Treinen is a veteran arm in the Dodgers' bullpen, which means high-leverage opportunities are baked into his profile. If this strikeout surge holds for another week, expect that ownership number to spike past the point where he's a free add.

For context, Razzball currently projects Treinen as the 93rd-ranked relief pitcher for the rest of the season — a projection that clearly hasn't caught up with what the last 30 days of data are showing. Meanwhile, other rostered relievers like Jhoan Duran and Seranthony Domínguez are commanding far higher ownership despite Treinen's recent numbers being comparable or better in the skills indicators. Jeff Hoffman is another name in the RP tier worth tracking alongside Treinen as you evaluate your bullpen needs.

The Caution

We have to be honest about sample size. We're working with 7.7 innings over the last 30 days and just 2 innings in the most recent window. These are early signs that something could be emerging, not a finished product you can bank on. The confidence level here is firmly in "early signal" territory. A dominant week from a reliever can evaporate just as quickly as it appeared.

Verdict: Watch

Blake Treinen is a Watch. The skills indicators — a 1.60 FIP, 33.3% K rate, and zero earned runs across all rolling windows — are legitimately exciting, especially from a Dodgers reliever with a track record of high-leverage work. WaiverScout identified him early at 0.6% ownership and the signal has only strengthened since. Don't rush to drop a productive arm for him yet, but get him on your watchlist immediately. If the strikeout rate holds through another full week of appearances, the classification will likely escalate — and by then, he won't be free.