Who's more valuable, rest of season
Too close to call.
They split your categories 2–2, 1 even. Take whoever fills a bigger need.
Head-to-head
K
▶
◀
ERA
WHIP
W
▶
◀
SV
Aroldis Chapman wins 2 (ERA, SV); Devin Williams wins 2 (K, W); 1 even.
04
Under the hood
Underlying skill — each value vs league avgFastball Velolg 94.0 · higher = better
Aroldis Chapman
97.0
Devin Williams
93.9
Swinging-Strike %lg 11.0% · higher = better
Aroldis Chapman
15.8%
Devin Williams
17.7%
Strikeout %lg 22.0% · higher = better
Aroldis Chapman
32.3%
Devin Williams
28.7%
Chase %lg 28.5% · higher = better
Aroldis Chapman
32.6%
Devin Williams
39.0%
Hard-Hit % Allowedlg 40.0% · lower = better
Aroldis Chapman
38.3%
Devin Williams
29.2%
Barrel % Allowedlg 8.0% · lower = better
Aroldis Chapman
7.0%
Devin Williams
4.7%
xwOBA Allowedlg .315 · lower = better
Aroldis Chapman
.255
Devin Williams
.282
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
27.37
lg xERA 4.10
now 0.48
2.69
Devin Williams
27.37
lg xERA 4.10
now 5.40
3.70
WHIPlower is better
Aroldis Chapman
.9001.83
now 0.86
1.24
Devin Williams
.9001.83
now 1.55
1.24
Volume · rest of season
Strikeoutshigher is better
Aroldis Chapman
4041
now 25
6
Devin Williams
4041
now 31
8
Winshigher is better
Aroldis Chapman
.0004.20
now 0
0–0
Devin Williams
.0004.20
now 3
0–1
Saveshigher is better
Aroldis Chapman
.00016.40
now 12
2–4
Devin Williams
.00016.40
now 8
1–2
If you already own them — trade angle
BuyAroldis Chapman — buy.conf 0.92
Buy LowDevin Williams — buy low. The dip is a window to acquire.conf 0.90