Vaughn Grissom Is Heating Up at the Right Time — And Nobody's Paying Attention

Vaughn Grissom just posted a .468 wOBA over the last seven days while cutting his strikeout rate in half. At 3% rostered, this isn't on anyone's radar yet. The data says it should be.

The Signal: A Legitimate Surge

Let's lay this out clearly. Grissom's rolling windows tell a story of a hitter who has found something:

  • 7-day wOBA: .468 — up from .338 over 30 days
  • 7-day K%: 8.3% — down from 18.2% over 30 days
  • 7-day BB%: 8.3% — up from 6.4% over 30 days
  • 7-day AVG: .350 with 2 HR across 24 PA

That strikeout rate plummeting from 18.2% to 8.3% while walk rate ticks up is exactly the profile change you want to see. It suggests a mechanical or approach adjustment, not just lucky BABIP. He's putting the bat on the ball more often and being more selective — at the same time. That's rare and meaningful.

His last five games reinforce it: 7-for-19 with 2 homers, 5 RBI, only 2 strikeouts against 2 walks. The September 22nd and 23rd games — going 5-for-8 combined with a homer and 4 RBI — are the kind of back-to-back performances that signal real confidence at the plate.

Skills Check: What the Underlying Numbers Say

Here's where you need to keep your expectations calibrated. Grissom's hard-hit rate sits at 43.1% over the last seven days, up from 33.2% over 30 days and 28.5% over 14 days. That's a real jump. His exit velocity has nudged up too — 87.7 mph over the last week compared to 86.3 mph over 30 days. It's not elite-tier exit velo, but the improvement in hard contact is the more telling indicator. He's squaring balls up more consistently.

The 30-day hard-hit rate of 33.2% and 86.3 mph EV tell you this isn't a player with top-shelf power tools. But six homers over 110 PA in the last month shows there's game power here, especially with the multi-position eligibility (1B, 2B, 3B) that adds significant roster flexibility.

WaiverScout Has Been Tracking This

We first flagged Grissom back on July 12 as a watch at just 1% rostered. We upgraded him to add now on July 31 when the signal peaked, then moved him back to deprioritize through August as the production faded. The pattern is clear: Grissom runs hot and cold, and right now the burner is on. We reclassified him as a watch on September 2 at 3% — and this latest surge validates that call. No major fantasy outlet has picked up on this latest hot stretch, which means the waiver wire window is still wide open.

Ownership Context

At 3% rostered with stable ownership velocity, there's no rush to the wire yet. That gives you time to evaluate — but not unlimited time. If this week's numbers carry into another strong stretch, the algorithm moves fast and so do savvy managers. Players at similar positions like Sal Stewart and Royce Lewis carry higher profiles, but Grissom's multi-position eligibility and current hot streak make him a viable alternative in deeper formats.

Verdict: Watch

Grissom is a hold on your watchlist, not a must-add — yet. The 7-day numbers are legitimately impressive, and the strikeout rate decline paired with improved hard contact suggests this isn't pure noise. But 50 PA is a solid sample, not a conclusive one, and his 30-day underlying metrics (86.3 mph EV, 33.2% hard-hit rate) remind you that the ceiling here is streamer, not season-changer. Monitor through the next week. If the K% stays suppressed and the hard contact holds, this becomes an add. The data is clear — something has changed. The question is whether it sticks.