MLB Daily DeltaWeek 19 · July 31, 2026
Portrait of Bubba Chandler
Bubba Chandler
PIT · P
Change to
Portrait of Martín Pérez
Martín Pérez
ATL · 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

Bubba Chandler wins 2 (K, ERA); Martín Pérez wins 2 (WHIP, W); SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Bubba Chandler
98.5
Martín Pérez
89.9
Swinging-Strike %lg 11.0% · higher = better
Bubba Chandler
11.1%
Martín Pérez
9.1%
Strikeout %lg 22.0% · higher = better
Bubba Chandler
20.1%
Martín Pérez
18.5%
Chase %lg 28.5% · higher = better
Bubba Chandler
29.3%
Martín Pérez
25.6%
Hard-Hit % Allowedlg 40.0% · lower = better
Bubba Chandler
36.8%
Martín Pérez
38.1%
Barrel % Allowedlg 8.0% · lower = better
Bubba Chandler
6.2%
Martín Pérez
6.4%
xwOBA Allowedlg .315 · lower = better
Bubba Chandler
.308
Martín Pérez
.332
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
Bubba Chandler
25.67
lg xERA 4.10
now 4.85
3.97
Martín Pérez
25.67
lg xERA 4.10
now 2.79
4.48
WHIPlower is better
Bubba Chandler
.9001.70
now 1.52
1.45
Martín Pérez
.9001.70
now 1.06
1.38

Volume · rest of season
Strikeoutshigher is better
Bubba Chandler
4059.60
now 52
45
Martín Pérez
4059.60
now 42
33
Winshigher is better
Bubba Chandler
.2003.80
now 1
11
Martín Pérez
.2003.80
now 3
23

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

If you already own them — trade angle
Hold · steadyBubba Chandler — hold.conf 0.60
Sell HighMartín Pérez — sell high. His value is peaking; good time to trade him.conf 0.95
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