Jonah Heim Is Heating Up at the Right Time — And Almost Nobody Owns Him

Jonah Heim just posted a .362 wOBA over the last seven days, a massive jump from his .278 mark over 30 days, and he's rostered in just 5% of leagues. If you need catcher production, the data is clear: Heim is surging, and the window to act is now.

The Signal Is Real

WaiverScout has been tracking Heim since March, cycling him between watch and deprioritize classifications as his bat went cold through the first half. We first flagged him on April 22 at 0% ownership, and again on July 1 at just 2%. The signal kept flickering — not enough to act, but enough to keep watching. Now, at 5% rostered and climbing (+3% in the last week), the breakout looks legitimate.

Look at the rolling windows and the trend becomes undeniable:

  • 7-day wOBA: .362 — elite-level production at catcher
  • 14-day wOBA: .324 — still well above average
  • 30-day wOBA: .278 — the cold baseline he's climbing out of

This isn't a one-game blip. Over the last five games, Heim went 6-for-20 with a homer and steady contact. His 3-for-5 outburst on July 29 — which included a solo shot, noted by FantasyPros — was the most visible moment, but the underlying approach changes are what matter more.

The Approach Has Changed

Heim's strikeout rate has plummeted from 20.5% over 30 days to 13.8% over the last seven. That's a dramatic improvement. Simultaneously, his walk rate has jumped from 2.4% to 6.9% in the same window. He's making more contact and being more selective — the combination you want to see when evaluating whether a hot streak has staying power.

Over 52 plate appearances across the 14-day window, his .271 average and .324 wOBA provide a broader lens that still looks strong. That's not small-sample noise. That's a hitter who has genuinely recalibrated.

The Statcast Concern

There's one flag worth monitoring. His 14-day exit velocity sits at 78.3 mph, which is well below the 88.8 mph he posted over 30 days, and his hard-hit rate over 14 days registered at 0%. That's a stark disconnect from his results. It suggests some of this production has come on softer contact that found holes — the kind of approach that can sustain batting average at catcher for stretches but raises questions about power durability beyond his 2 homers over the last seven days.

That said, his 30-day hard-hit rate of 29.2% and 88.8 mph exit velocity suggest the raw power tool exists. If the improved plate discipline holds while the exit velocities normalize upward, Heim could deliver a genuinely productive second half.

The Opportunity Is Locked In

Heim logged 29 plate appearances in the last seven days — consistent, everyday playing time. With trade deadline buzz swirling around his name — Yahoo Sports has reported on potential interest from the Dodgers — his role is secure either way. A trade to a contender could actually boost his fantasy value further.

At 5% rostered, he's cheaper than alternatives like Gabriel Moreno, Drake Baldwin, or Cal Raleigh — and right now, he's outproducing the waiver-wire options at the position.

Verdict: Watch

Heim is a Watch, not an add — yet. The plate discipline improvements are real and supported by a solid 52-PA sample. But the exit velocity disconnect demands another week of data before committing a roster spot. If you're in a deeper league or desperate at catcher, grabbing him now is defensible. In standard formats, monitor the next seven days closely. If the hard contact returns and the K% stays suppressed, this becomes a clear add. WaiverScout has been tracking this signal for months — the trend line is finally pointing in the right direction.