MLB Daily DeltaWeek 19 · August 3, 2026
Aaron Bummer
KC · P
Change to
Portrait of Luke Weaver
Luke Weaver
NYM · P
Change to
Who's more valuable, rest of season

Too close to call.

They split your categories 11, 2 even. Take whoever fills a bigger need.

Head-to-head
K
ERA
WHIP
W
SV n/a

Aaron Bummer wins 1 (K); Luke Weaver wins 1 (ERA); 2 even; SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Aaron Bummer
90.5
Luke Weaver
95.3
Swinging-Strike %lg 11.0% · higher = better
Aaron Bummer
10.6%
Luke Weaver
15.9%
Strikeout %lg 22.0% · higher = better
Aaron Bummer
16.9%
Luke Weaver
26.5%
Chase %lg 28.5% · higher = better
Aaron Bummer
27.4%
Luke Weaver
34.0%
Hard-Hit % Allowedlg 40.0% · lower = better
Aaron Bummer
54.7%
Luke Weaver
33.9%
Barrel % Allowedlg 8.0% · lower = better
Aaron Bummer
15.1%
Luke Weaver
8.3%
xwOBA Allowedlg .315 · lower = better
Aaron Bummer
.386
Luke Weaver
.265
stabilized — trust it · small sample yet · dashed = league avg · right = better
05

The tape

Rest-of-season projection · bold = leads
rest-of-season projection current season projection range
Rate · earned-run quality
ERAlower is better
Aaron Bummer
28.25
lg xERA 4.10
now 8.82
3.70
Luke Weaver
28.25
lg xERA 4.10
now 2.77
3.66
WHIPlower is better
Aaron Bummer
.9002.33
now 1.96
1.24
Luke Weaver
.9002.33
now 1.04
1.24

Volume · rest of season
Strikeoutshigher is better
Aaron Bummer
4030.60
now 13
16
Luke Weaver
4030.60
now 25
15
Winshigher is better
Aaron Bummer
.0002.80
now 1
01
Luke Weaver
.0002.80
now 2
12

SV — not applicable. Both pitch out of the rotation.

If you already own them — trade angle
Hold · wait & seeAaron Bummer — hold.conf 0.50
Sell HighLuke Weaver — sell high. His value is peaking; good time to trade him.conf 0.95
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