MLB Daily DeltaWeek 27 · September 27, 2026
week 27
this weekSELL-HIGH
last weekSELL-HIGH

George Klassen

LAA·P
data as of September 27, 2026·week 27
ON THE 15-DAY IL
Sell High BABIP-against 0.273 suppressed and unstable, flattering the ERA; luck-free xERA 5.61 is 1.94 above the ERA, regression coming; sell into the hype before regression.high 0.95
ROSK 0ERA 4.10WHIP 1.30W 0–0SV 0

Klassen is a sell-high — the ERA is running on luck

His ERA is 3.67, nearly half a run better than league average, and the number holding it there is his BABIP-against: .273, below the league average of .295. BABIP-against needs around 800 balls in play to be reliable, and he has 79, so that gap is luck, not skill. Strip out the noise and his expected ERA is 5.61 — 1.94 runs worse than the scoreboard shows. The contact he allows backs that up: a 45.6% hard-hit rate against a 40% league average, on enough batted balls to trust. He strikes out only 19.2% of batters, below the 22% league average, so there is no swing-and-miss floor to catch the fall. Limited data here — this call rests on the first stable sample. Sell high.

Drivers

  • babip_againstNOISEBABIP-against 0.273 suppressed and unstable — flattering the ERA
  • xeraNOISEluck-free xERA 5.61 is 1.94 above the ERA — regression coming
metric · nowrolling trajectoryvs. leaguestabilized?
Hard-Hit % Allowed45.6%
45.6%*
lg avg 40.0% ▲+5.6%vs his norm —
79 / 50 BBE
Barrel % Allowed8.9%
8.9%*
lg avg 8.0% ▲+0.9%vs his norm —
79 / 60 BBE
xwOBA Allowed.358
.358*
lg avg .315 ▲+.043vs his norm —xwOBA Allowed is above the ~.315 league average — expect it to fall.
125 / 200 TBF
xERA5.61
5.61*
lg avg 4.10 ▲+1.51vs his norm —xERA is above the ~4.10 league average — expect it to fall.
125 / 200 TBF
ERA3.67
3.67*
lg avg 4.10 ▼−0.43vs his norm —ERA is below the ~4.10 league average — expect it to rise.
27 / 200 IP
Strikeout %19.2%
19.2%*
lg avg 22.0% ▼−2.8%vs his norm —
125 / 70 TBF
Walk %16.8%
16.8%*
lg avg 8.0% ▲+8.8%vs his norm —Walk % is above the ~8.0% league average — expect it to fall.
125 / 170 TBF
BABIP Against.273
.273*
lg avg .295 ▼−.022vs his norm —BABIP Against is below the ~.295 league average — expect it to rise.
79 / 800 BIP
Swinging-Strike %14.3%
14.3%*
lg avg 11.0% ▲+3.3%vs his norm —
125 / 60 TBF
Chase %25.4%
25.4%*
lg avg 28.5% ▼−3.1%vs his norm —
125 / 60 TBF
Fastball Velo96.4 mph
96.4 mph*
lg avg 94.0 mph ▲+2.4 mphvs his norm —
491 / 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% 19.2%→19.8%signal0 K — K% 19.2% (signal) lifted to SP mean ~22.0% → projected 19.8% over ~0 remaining IP.
xERA 5.61noise4.10 ERA — xERA 5.61 (noise) blended 0% skill / 100% league 4.10 at 9 IP.
BB% 16.8% + contactnoise1.30 WHIP — a 17% walk rate plus BABIP-against 0.293 gives a 1.80 skill WHIP, blended 0…
run support + role0-0 W — wins ride run support and how deep he goes, not just skill.
role (starter)0 SV — role: starter, not in the save mix.
rosterdrop0 K ROS, 4.10 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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