MLB Daily DeltaWeek 17 · July 18, 2026
Engraved portrait of Ryan Zeferjahn
week 17
this weekHOLD
last weekHOLD

Ryan Zeferjahn

data as of July 18, 2026·week 17
Hold · wait & see skill near league average (3.26); hold and wait — key skill metric not yet stable enough to call.med 0.50 (narrative held for review)
ROSK 26WHIP 1.25ERA 3.67W 1–3SV 0–2

Zeferjan is a hold — league-average skill with unstable driver.

ROS projects K 32 YTD → 26 ROS, WHIP 1.39 YTD → 1.25 ROS. Stable, rosterable; no clear edge to exploit either way.

VS His Norm

  • Strikeout %31.9%+4.2%vs his ~27.7% career norm
  • Walk %15.7%+2.2%vs his ~13.5% career norm

Drivers

  • xeraNOISEskill near league average (3.26)
metric · nowrolling trajectoryvs. leaguestabilized?
Hard-Hit % Allowed35.9%
35.9%*
lg avg 40.0% −4.1%vs his norm —
92 / 50 BBE
Barrel % Allowed5.4%
believable since May 285.4%*
lg avg 8.0% −2.6%vs his norm —
92 / 60 BBE
xwOBA Allowed.282
.282*
lg avg .315 −.033vs his norm —xwOBA Allowed is below the ~.315 league averageexpect it to rise.
191 / 200 TBF
xERA3.26
3.26*
lg avg 4.10 −0.84vs his norm —xERA is below the ~4.10 league averageexpect it to rise.
191 / 200 TBF
ERA3.89
3.89*
lg avg 4.10 −0.21vs his norm —ERA is below the ~4.10 league averageexpect it to rise.
44 / 200 IP
Strikeout %31.9%
norm31.9%*
lg avg 22.0% +9.9%vs his norm +4.2%
191 / 70 TBF
Walk %15.7%
norm15.7%*
lg avg 8.0% +7.7%vs his norm +2.2%
191 / 170 TBF
BABIP Against.216
.216*
lg avg .295 −.079vs his norm —BABIP Against is below the ~.295 league averageexpect it to rise.
92 / 800 BIP
Swinging-Strike %13.2%
13.2%*
lg avg 11.0% +2.2%vs his norm —
191 / 60 TBF
Chase %23.0%
23.0%*
lg avg 28.5% −5.5%vs his norm —
191 / 60 TBF
Fastball Velo97.5 mph
97.5 mph*
lg avg 94.0 mph +3.5 mphvs his norm —
828 / 50 PITCHES

5×5 ROS Outlook

rest of season

Where each category goes the rest of the way, and the skill that drives it. Tap a row to expand the full derivation.

statytdrosdriverconf
K% 31.9%→29.8%signal26 K — K% 31.9% (signal) tempered to career ~27.7% → projected 29.8% over ~23 remaining…
xERA 3.26noise3.67 ERA — xERA 3.26 (noise) blended 6% skill / 94% league 3.70 at 27 IP.
BB% 15.7% + contactsignal1.25 WHIP — a 16% walk rate plus BABIP-against 0.286 gives a 1.47 skill WHIP, blended 6…
run support + role1-3 W — wins ride run support and how deep he goes, not just skill.
role (setup)0-2 SV — role: setup, in the save mix only situationally.
rosterdeep3.67 ERA, 1.25 WHIP

Every projection traces to a sabermetric input. The driver and confidence shown per row are always visible; tap any row to expand the full derivation.

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