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, his strikeout rate has been cut in half, and he's rostered in just 3% of leagues. If you're hunting for a late-September difference-maker with multi-position eligibility, the data says pay attention right now.

The Signal: A Week That Demands Your Attention

Grissom's last seven days are impossible to ignore. He's slashing with a .350 AVG, 2 HR, and a .468 wOBA across 24 plate appearances. That wOBA represents a massive leap from his .338 mark over the last 30 days. More importantly, the process behind the results looks legitimate: his K% dropped to 8.3% over the past week compared to 18.2% over 30 days, while his BB% climbed to 8.3% from 6.4%. That's a hitter who's seeing the ball better, not just getting lucky.

His last five games tell the story clearly. Back-to-back multi-hit performances on September 22nd (3-for-4, 2 RBI) and September 23rd (2-for-4, HR, 2 RBI) anchor the surge, with zero strikeouts in either game. Even in the quieter games earlier in the stretch, he was drawing walks and making contact. This isn't a BABIP mirage — the approach has genuinely shifted.

Rolling Windows: What's Real and What's Noise

Here's where you separate the signal from the noise. Compare the windows:

  • 7-day: .350 AVG | .468 wOBA | 8.3% K% | 43.1% Hard Hit% | 87.7 mph EV
  • 14-day: .244 AVG | .349 wOBA | 18% K% | 28.5% Hard Hit% | 86.7 mph EV
  • 30-day: .242 AVG | .338 wOBA | 18.2% K% | 33.2% Hard Hit% | 86.3 mph EV

The 30-day numbers are fine — a .338 wOBA with 6 HR over 110 PA is useful production. But the recent surge shows a player whose contact quality and plate discipline are both trending sharply upward. His hard-hit rate jumped from 33.2% over 30 days to 43.1% in the last week, and his exit velocity ticked up to 87.7 mph. That's the kind of underlying improvement that suggests the surface stats have room to hold.

WaiverScout Has Been Tracking This

This isn't the first time our algorithm has flagged Grissom. We first identified him as a Watch back on July 12th when he was rostered in just 1% of leagues. We upgraded him to Add Now on July 31st at 6% ownership, then watched the signal cool through August, correctly downgrading him to Deprioritize multiple times. That same system flagged him as Deprioritize as recently as September 16th — and now the numbers have forced a re-evaluation. The algorithm doesn't have loyalty; it follows the data. And the data has turned.

No major fantasy publication is talking about Grissom right now. This signal is ahead of the mainstream conversation, which means you have a window before a potential ownership spike.

The Case for Caution

The exit velocity at 87.7 mph isn't elite, and the 43.1% hard-hit rate over just one week needs a longer runway to trust fully. His 14-day hard-hit rate of 28.5% is a reminder that cold stretches are part of his profile. With 1B/2B/3B eligibility he's versatile, but if you're comparing him to someone like Sal Stewart or Royce Lewis at the same positions, you need to weigh opportunity and ceiling carefully.

Verdict: Watch

Grissom is a Watch, not an add — yet. The last seven days are legitimately impressive, the strikeout rate improvement is backed by 50 PA of solid sample size, and the multi-position eligibility adds clear value. But the 30-day underlying metrics need to catch up to the recent hot streak before he becomes a must-add. Keep him at the top of your watch list. If the K% stays below 12% and the hard-hit rate holds above 35% through next week, move fast. At 3% rostered, you'll have time — but not much.