MLB Daily DeltaWeek 25 · September 10, 2026
Portrait of Ryan Weathers
Ryan Weathers
NYY · P
Change to
Portrait of Spencer Arrighetti
Spencer Arrighetti
TOR · P
Change to
Who's more valuable, rest of season

Ryan Weathers.

He projects to help you in more roto categories the rest of the way — strikeouts, ERA, and WHIP. Spencer Arrighetti’s box score looks better right now, but the luck-stripped projection flips it.

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

Ryan Weathers wins 3 categories (K, ERA, WHIP); Spencer Arrighetti wins 1 (W); SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Ryan Weathers
95.8
Spencer Arrighetti
92.4
Swinging-Strike %lg 11.0% · higher = better
Ryan Weathers
12.1%
Spencer Arrighetti
10.7%
Strikeout %lg 22.0% · higher = better
Ryan Weathers
25.2%
Spencer Arrighetti
21.8%
Chase %lg 28.5% · higher = better
Ryan Weathers
28.9%
Spencer Arrighetti
26.5%
Hard-Hit % Allowedlg 40.0% · lower = better
Ryan Weathers
40.6%
Spencer Arrighetti
30.8%
Barrel % Allowedlg 8.0% · lower = better
Ryan Weathers
8.6%
Spencer Arrighetti
9.1%
xwOBA Allowedlg .315 · lower = better
Ryan Weathers
.319
Spencer Arrighetti
.350
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
Ryan Weathers
26.28
lg xERA 4.10
now 3.52
4.22
Spencer Arrighetti
26.28
lg xERA 4.10
now 1.34
4.87
WHIPlower is better
Ryan Weathers
1.011.54
now 1.14
1.25
Spencer Arrighetti
1.011.54
now 1.13
1.42

Volume · rest of season
Strikeoutshigher is better
Ryan Weathers
40100.20
now 75
15
Spencer Arrighetti
40100.20
now 43
12
Winshigher is better
Ryan Weathers
.0009.80
now 2
01
Spencer Arrighetti
.0009.80
now 7
13

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

If you already own them — trade angle
Hold · leans sellRyan Weathers — hold.conf 0.60
SellSpencer Arrighetti — sell.conf 0.90
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