MLB Daily DeltaWeek 17 · July 18, 2026
Engraved portrait of Lucas Erceg
week 17
this weekBUY-LOW
last weekBUY-LOW

Lucas Erceg

KC·P
data as of July 18, 2026·week 17
Buy Low fastball velocity stable and above league, the arm is fine — luck-free xERA 4.30 is right around league, a usable arm the ERA is hiding; BABIP-against 0.318 elevated and unstable, bloating the ERA; buy the player, not the number.high 0.84
ROSK 22ERA 3.71WHIP 1.25W 2–4SV 7–14

Erceg is a buy-low — the ERA is a BABIP mirage.

Erceg's ERA sits at 5.11, but the arm is fine and the luck is temporary. His BABIP-against is .318, 23 points above league average, and that number is noise at 114 balls in play — well short of the 800 needed for reliability. Strip out the bad bounces and his expected ERA drops to 4.30, right around league average. His fastball velocity is a stable 97.2 mph, above the 94.0 league average, and it has been stepping up across the sample. His barrel rate allowed is 6.1%, below league average, and his chase rate is near the league mean. The skills are there; the surface is lying. Strikeout rate is a touch below league at 16.4%, but not enough to undercut the play. Buy low. 22 K and 7-14 SV on a 3.71 ERA make Erceg a buy-low asset once the luck flips.

VS His Norm

  • Strikeout %16.4%—−7.8% ▼vs his ~24.2% career norm

Drivers

  • xeraNOISEluck-free xERA 4.30 is right around league — a usable arm the ERA is hiding
  • babip_againstNOISEBABIP-against 0.318 elevated and unstable — bloating the ERA
  • p_fastball_veloSIGNALfastball velocity stable and above league — the arm is fine
metric · nowrolling trajectoryvs. leaguestabilized?
Hard-Hit % Allowed40.4%
40.4%*
lg avg 40.0% ▲+0.4%vs his norm —
114 / 50 BBE
Barrel % Allowed6.1%
believable since May 256.1%*
lg avg 8.0% ▼−1.9%vs his norm —
114 / 60 BBE
xwOBA Allowed.321
.321*
lg avg .315 ▲+.006vs his norm —xwOBA Allowed is above the ~.315 league average — expect it to fall.
165 / 200 TBF
xERA4.30
4.30*
lg avg 4.10 ▲+0.20vs his norm —xERA is above the ~4.10 league average — expect it to fall.
165 / 200 TBF
ERA5.11
5.11*
lg avg 4.10 ▲+1.01vs his norm —ERA is above the ~4.10 league average — expect it to fall.
37 / 200 IP
Strikeout %16.4%
norm16.4%*
lg avg 22.0% ▼−5.6%vs his norm −7.8% ▼
165 / 70 TBF
Walk %12.7%
norm12.7%*
lg avg 8.0% ▲+4.7%vs his norm +3.0% ▲Walk % is above his ~9.8% norm — expect it to fall.
165 / 170 TBF
BABIP Against.318
.318*
lg avg .295 ▲+.023vs his norm —BABIP Against is above the ~.295 league average — expect it to fall.
114 / 800 BIP
Swinging-Strike %10.3%
10.3%*
lg avg 11.0% ▼−0.7%vs his norm —
165 / 60 TBF
Chase %28.4%
28.4%*
lg avg 28.5% ▼−0.1%vs his norm —
165 / 60 TBF
Fastball Velo97.2 mph
97.2 mph*
lg avg 94.0 mph ▲+3.2 mphvs his norm —
661 / 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% 16.4%→20.7%signal22 K — K% 16.4% (signal) lifted to career ~24.2% → projected 20.7% over ~20 remaining IP.
xERA 4.30noise3.71 ERA — xERA 4.30 (noise) blended 1% skill / 99% league 3.70 at 21 IP.
BB% 12.7% + contactnoise1.25 WHIP — a 13% walk rate plus BABIP-against 0.298 gives a 1.68 skill WHIP, blended 1…
run support + role2-4 W — wins ride run support and how deep he goes, not just skill.
role (closer)7-14 SV — role: closer.
rosterstandard22 SV, 3.71 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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