Dedniel Núñez: The Mets Reliever Nobody's Watching Just Posted a 1.28 FIP Over His Last Week

Dedniel Núñez isn't on anyone's radar. Rostered in just 1% of leagues, absent from any mainstream fantasy coverage we can find, the Mets right-hander has been quietly carving through lineups with elite-level swing-and-miss stuff and a FIP that demands attention. Early signs suggest something real is building here.

The Signal

Over his last 3.3 innings (7-day window), Núñez posted a 0.00 ERA with an 8.18 K/9 and a stunning 1.28 FIP. That FIP isn't a mirage propped up by luck — it's backed by a 30.0% strikeout rate over that stretch, which is actually ticking up from his 28.6% mark over the past 30 days. When a reliever's already-strong K rate is accelerating, that's exactly the kind of skill development WaiverScout's algorithm is designed to detect.

Rolling Window Breakdown

Here's where the progression tells the story:

  • 7-day: 0.00 ERA | 8.18 K/9 | 1.28 FIP (3.3 IP)
  • 14-day: 2.09 ERA | 8.37 K/9 | 4.26 FIP (4.3 IP)
  • 30-day: 0.84 ERA | 8.41 K/9 | 2.45 FIP (10.7 IP)

The 30-day picture is the most stabilized sample here: a 0.84 ERA and 2.45 FIP across 10.7 innings is legitimately excellent. The 14-day window shows a brief hiccup where his FIP ballooned to 4.26 despite the K/9 holding steady — likely a hard-contact blip or a walk spike — but the most recent 7-day data shows that the underlying skills have snapped back sharply. The 1.28 FIP in his latest stretch is the best window he's shown, and the strikeout rate is climbing alongside it.

WaiverScout Was Watching First

We flagged Núñez twice before — on August 18 and again on September 19 — both times classified as deprioritize. The numbers weren't there yet. But the algorithm kept tracking him, and the signal has strengthened materially since that last flag. His K rate has risen, his FIP has cratered, and his ERA over the last month sits below 1.00. This is the progression from noise to signal, and it's why WaiverScout monitors players even after deprioritizing them. The data changed. So did the classification.

The Ownership Window

At 1% rostered with stable ownership velocity, there is zero competition for Núñez on your waiver wire right now. No mainstream fantasy outlet has written about him. This is as early as you can get on a reliever showing these indicators. If he maintains anything close to this K rate and FIP trajectory, that 1% number won't stay there long — especially if the Mets start leveraging him in higher-leverage situations down the September stretch.

For context, if you're already carrying relievers like Emilio Pagán or Riley O'Brien, Núñez's recent skills profile could be emerging as a comparable or superior option. Managers rostering Tanner Scott obviously aren't dropping him, but Núñez's FIP and K-rate trends put him in a conversation with mid-tier relievers who are far more widely owned.

Verdict: Watch

Do not rush to add Dedniel Núñez. The sample size is small — we're working with early-signal confidence across limited innings. A 30.0% K rate and 1.28 FIP over 3.3 innings could evaporate in one bad outing. But the 30-day trend validates that this isn't a single-game fluke: 10.7 innings of sub-1.00 ERA pitching with consistent strikeout numbers is worth monitoring closely. Add him to your watchlist now. If the K rate holds and the FIP stays elite through another week of appearances, the classification upgrades — and by then, you'll want to have been paying attention. WaiverScout caught the turn. Now we wait for confirmation.