MLB Daily DeltaWeek 25 · September 10, 2026
Engraved portrait of Sean Newcomb
week 25
this weekSELL-HIGH
last weekHOLD

Sean Newcomb

data as of September 10, 2026·week 25
flipped from HOLD on September 10, 2026
Sell High luck-free xERA 3.84 is 1.42 above the ERA, regression coming — BABIP-against 0.267 suppressed and unstable, flattering the ERA; sell into the hype before regression.high 0.95
ROSK 5ERA 3.79WHIP 1.29W 0–0SV 0–0

Newcomb is a sell-high — his 2.42 ERA is BABIP luck, not skill.

His ERA is 2.42, and the number holding it down is his BABIP-against: .267, against a league average of .295. BABIP-against needs around 800 balls in play to be reliable, and he has 221. That gap is luck, not a skill he owns. His expected ERA is 3.84, a run and a half higher than the box score, and his xERA has been stepping down across the sample, so even the corrected number may be optimistic. His strikeout rate is 22.4% and his walk rate is 8.5%, both right at league average — this is not a pitcher whose stuff is missing bats. The surface is doing the work; the underlying numbers are not. Sell high. The ROS line still reads 3.79 ERA and 1.29 WHIP with just 5 K — a deep-league trade window, so sell before that ratio catches the luck.

VS His Norm

  • Walk %8.5%−2.8%vs his ~11.3% career norm
  • Strikeout %22.4%−0.6%vs his ~23.0% career norm

Drivers

  • babip_againstNOISEBABIP-against 0.267 suppressed and unstable — flattering the ERA
  • xeraSIGNALluck-free xERA 3.84 is 1.42 above the ERA — regression coming
metric · nowrolling trajectoryvs. leaguestabilized?
Hard-Hit % Allowed37.1%
37.1%*
lg avg 40.0% −2.9%vs his norm —
221 / 50 BBE
Barrel % Allowed5.4%
5.4%*
lg avg 8.0% −2.6%vs his norm —
221 / 60 BBE
xwOBA Allowed.303
believable since Jul 3.303*
lg avg .315 −.012vs his norm —
330 / 200 TBF
xERA3.84
3.84*
lg avg 4.10 −0.26vs his norm —
330 / 200 TBF
ERA2.42
2.42*
lg avg 4.10 −1.68vs his norm —ERA is below the ~4.10 league averageexpect it to rise.
81.7 / 200 IP
Strikeout %22.4%
norm22.4%*
lg avg 22.0% +0.4%vs his norm −0.6%
330 / 70 TBF
Walk %8.5%
norm8.5%*
lg avg 8.0% +0.5%vs his norm −2.8%
330 / 170 TBF
BABIP Against.267
.267*
lg avg .295 −.028vs his norm —BABIP Against is below the ~.295 league averageexpect it to rise.
221 / 800 BIP
Swinging-Strike %10.6%
10.6%*
lg avg 11.0% −0.4%vs his norm —
330 / 60 TBF
Chase %27.3%
27.3%*
lg avg 28.5% −1.2%vs his norm —
330 / 60 TBF
Fastball Velo94.7 mph
94.7 mph*
lg avg 94.0 mph +0.7 mphvs his norm —
1280 / 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% 22.4%→22.6%signal5 K — K% 22.4% (signal) held to career ~23.0% → projected 22.6% over ~6 remaining IP.
xERA 3.84signal3.79 ERA — xERA 3.84 (signal) blended 65% skill / 35% league 3.70 at 34 IP.
BB% 8.5% + contactsignal1.29 WHIP — a 8% walk rate plus BABIP-against 0.287 gives a 1.32 skill WHIP, blended 65…
run support + role0-0 W — wins ride run support and how deep he goes, not just skill.
role (setup)0-0 SV — role: setup, in the save mix only situationally.
rosterdeep3.79 ERA, 1.29 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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