MLB Daily DeltaWeek 17 · July 18, 2026
Engraved portrait of Kumar Rocker
week 17
this weekSELL
last weekHOLD

Kumar Rocker

data as of July 18, 2026·week 17
flipped from HOLD on July 18, 2026
Sell stable xERA 4.70 +0.60 vs league with no luck excuse; move on.med 0.73 (narrative held for review)
ROSK 43ERA 4.49WHIP 1.36W 1–3SV 0

Rocker is a sell — his xERA is climbing, no luck excuse.

Stable skill below league and not unlucky. Sell.

VS His Norm

  • Strikeout %20.5%+0.9%vs his ~19.6% career norm
  • Walk %8.7%−0.6%vs his ~9.3% career norm

Drivers

  • xeraSIGNALstable xERA 4.70 +0.60 vs league with no luck excuse
metric · nowrolling trajectoryvs. leaguestabilized?
Hard-Hit % Allowed43.2%
43.2%*
lg avg 40.0% +3.2%vs his norm —
273 / 50 BBE
Barrel % Allowed7.7%
7.7%*
lg avg 8.0% −0.3%vs his norm —
273 / 60 BBE
xwOBA Allowed.334
believable since May 25.334*
lg avg .315 +.019vs his norm —
390 / 200 TBF
xERA4.70
4.70*
lg avg 4.10 +0.60vs his norm —
390 / 200 TBF
ERA4.40
4.40*
lg avg 4.10 +0.30vs his norm —ERA is above the ~4.10 league averageexpect it to fall.
90 / 200 IP
Strikeout %20.5%
norm20.5%*
lg avg 22.0% −1.5%vs his norm +0.9%
390 / 70 TBF
Walk %8.7%
norm8.7%*
lg avg 8.0% +0.7%vs his norm −0.6%
390 / 170 TBF
BABIP Against.295
.295*
lg avg .295 .000vs his norm —BABIP Against is below the ~.295 league averageexpect it to rise.
273 / 800 BIP
Swinging-Strike %12.1%
12.1%*
lg avg 11.0% +1.1%vs his norm —
390 / 60 TBF
Chase %30.9%
30.9%*
lg avg 28.5% +2.4%vs his norm —
390 / 60 TBF
Fastball Velo94.4 mph
94.4 mph*
lg avg 94.0 mph +0.4 mphvs his norm —
1523 / 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% 20.5%→20.2%signal43 K — K% 20.5% (signal) tempered to career ~19.6% → projected 20.2% over ~55 remaining…
xERA 4.70signal4.49 ERA — xERA 4.70 (signal) blended 65% skill / 35% league 4.10 at 56 IP.
BB% 8.7% + contactsignal1.36 WHIP — a 9% walk rate plus BABIP-against 0.295 gives a 1.40 skill WHIP, blended 65…
run support + role1-3 W — wins ride run support and how deep he goes, not just skill.
role (starter)0 SV — role: starter, not in the save mix.
rosterdrop43 K ROS, 4.49 ERA

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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