MLB Daily DeltaWeek 19 · August 5, 2026
Germán Márquez
SD · P
Change to
Portrait of Mitch Keller
Mitch Keller
PIT · P
Change to
Who's more valuable, rest of season

Too close to call.

They split your categories 22. Take whoever fills a bigger need.

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

Germán Márquez wins 2 (ERA, W); Mitch Keller wins 2 (K, WHIP); SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Germán Márquez
94.6
Mitch Keller
93.3
Swinging-Strike %lg 11.0% · higher = better
Germán Márquez
9.1%
Mitch Keller
9.7%
Strikeout %lg 22.0% · higher = better
Germán Márquez
15.8%
Mitch Keller
17.7%
Chase %lg 28.5% · higher = better
Germán Márquez
26.2%
Mitch Keller
29.4%
Hard-Hit % Allowedlg 40.0% · lower = better
Germán Márquez
41.9%
Mitch Keller
42.3%
Barrel % Allowedlg 8.0% · lower = better
Germán Márquez
9.0%
Mitch Keller
7.4%
xwOBA Allowedlg .315 · lower = better
Germán Márquez
.348
Mitch Keller
.355
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
Germán Márquez
3.796.32
lg xERA 4.10
now 5.76
4.82
Mitch Keller
3.796.32
lg xERA 4.10
now 4.35
4.98
WHIPlower is better
Germán Márquez
1.061.56
now 1.45
1.43
Mitch Keller
1.061.56
now 1.17
1.38

Volume · rest of season
Strikeoutshigher is better
Germán Márquez
4063.80
now 19
27
Mitch Keller
4063.80
now 51
34
Winshigher is better
Germán Márquez
.8006.20
now 3
25
Mitch Keller
.8006.20
now 5
24

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

If you already own them — trade angle
Sell HighGermán Márquez — sell high. His value is peaking; good time to trade him.conf 0.87
SellMitch Keller — sell.conf 0.90
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