Zack Gelof Is Surging — And WaiverScout Saw It Coming

Zack Gelof is posting a .506 wOBA over the last seven days, and he's rostered in just 5% of leagues. That disconnect won't last. The Athletics second baseman has been on WaiverScout's radar since late April — we first flagged him on April 29 as a watch candidate when his ownership sat at 0%. We upgraded him again on May 7 at 2% ownership. Now the signal has strengthened to Add Now, and the numbers back it up.

The Rolling Window Tells the Story

Gelof's breakout isn't a one-game mirage. Look at the trajectory across his rolling windows:

  • 7-day: .333 AVG, 2 HR, .506 wOBA, 14.3% BB%, 23.8% K%, 21 PA
  • 14-day: .286 AVG, 2 HR, 1 SB, .381 wOBA, 10% BB%, 20% K%, 40 PA
  • 30-day: .273 AVG, 3 HR, 1 SB, .351 wOBA, 6.6% BB%, 24.6% K%, 61 PA

That wOBA progression — .351 to .381 to .506 — is the kind of accelerating trend that separates real breakouts from noise. His walk rate has more than doubled from 6.6% over 30 days to 14.3% in the last week, while his strikeout rate has ticked down from 24.6% to 23.8%. He's being more selective, and when he swings, he's doing damage. Over the last five games, Gelof has reached base in every single one, including multi-hit efforts and a pair of home runs.

The Batted Ball Data Is Real

This isn't hollow production built on bloops and luck. Gelof's exit velocity sits at 93.6 mph over the last seven days, with a 44.4% hard-hit rate. What's most encouraging is the exit velocity jump from his 30-day mark of 83.5 mph to his current 93.6 mph — a massive 10 mph improvement that suggests a mechanical adjustment or timing click that is translating into real power. His 14-day hard-hit rate of 47.2% confirms this isn't just a hot three-day stretch; the quality of contact has been elevated for weeks.

CBS Sports noted his recent surge, and FantasyPros has highlighted his power upside. The mainstream fantasy industry is starting to catch on, which means the window to add him for free is closing fast.

Opportunity Is Locked In

Gelof logged 21 plate appearances in the last seven days, confirming he's in the lineup daily. With dual eligibility at 2B and OF, he offers roster flexibility that makes him even more valuable in deeper formats. At 5% rostered with ownership velocity rising fast — up 5 percentage points in just a week — the adds are accelerating. In competitive leagues, this kind of ownership curve means he'll be gone within days.

If you're looking for context among similar options, Ceddanne Rafaela and other middle infielders carry higher ownership but haven't shown the kind of wOBA surge Gelof is delivering right now.

The Verdict: Add Now

The data is clear. Zack Gelof is producing elite-level offensive output over a solid 40-PA sample across 14 days, backed by legitimate batted-ball improvements and increasing plate discipline. WaiverScout identified this signal three weeks ago when nobody was paying attention. The classification has escalated from deprioritize to watch to Add Now — and if you wait for the next upgrade, he won't be available. Pick him up tonight. This is the kind of free talent that wins waiver wire season.