MLB Daily DeltaWeek 27 · September 27, 2026
Portrait of Aroldis Chapman
Aroldis Chapman
BOS · P
Change to
Portrait of David Bednar
David Bednar
NYY · P
Change to
Who's more valuable, rest of season

Too close to call.

They split your categories 1–1, 2 even. Take whoever fills a bigger need.

Head-to-head
K
◀
ERA
WHIP
▶
W
SV n/a

Aroldis Chapman wins 1 (ERA); David Bednar wins 1 (WHIP); 2 even; SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Aroldis Chapman
96.9
David Bednar
96.1
Swinging-Strike %lg 11.0% · higher = better
Aroldis Chapman
15.8%
David Bednar
16.4%
Strikeout %lg 22.0% · higher = better
Aroldis Chapman
33.3%
David Bednar
27.1%
Chase %lg 28.5% · higher = better
Aroldis Chapman
33.1%
David Bednar
38.4%
Hard-Hit % Allowedlg 40.0% · lower = better
Aroldis Chapman
38.1%
David Bednar
35.7%
Barrel % Allowedlg 8.0% · lower = better
Aroldis Chapman
6.8%
David Bednar
4.9%
xwOBA Allowedlg .315 · lower = better
Aroldis Chapman
.252
David Bednar
.263
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
Aroldis Chapman
26.11
lg xERA 4.10
now 0.48
2.64
David Bednar
26.11
lg xERA 4.10
now 4.50
2.87
WHIPlower is better
Aroldis Chapman
.9001.87
now 0.86
1.25
David Bednar
.9001.87
now 1.58
1.19

Volume · rest of season
Strikeoutshigher is better
Aroldis Chapman
4040.60
now 25
0
David Bednar
4040.60
now 29
0
Winshigher is better
Aroldis Chapman
.0001.48
now 0
0–0
David Bednar
.0001.48
now 1
0–0

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

If you already own them — trade angle
BuyAroldis Chapman — buy.conf 0.92
Sell HighDavid Bednar — sell high. His value is peaking; good time to trade him.conf 0.81
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