MLB Daily DeltaWeek 17 · July 20, 2026
Portrait of Freddy Peralta
Freddy Peralta
NYM · P
Change to
Portrait of Spencer Arrighetti
Spencer Arrighetti
HOU · P
Change to
Who's more valuable, rest of season

Freddy Peralta.

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 it’s built on luck that won’t hold.

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

Freddy Peralta 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
Freddy Peralta
94.1
Spencer Arrighetti
92.4
Swinging-Strike %lg 11.0% · higher = better
Freddy Peralta
12.4%
Spencer Arrighetti
10.9%
Strikeout %lg 22.0% · higher = better
Freddy Peralta
22.3%
Spencer Arrighetti
23.1%
Chase %lg 28.5% · higher = better
Freddy Peralta
29.2%
Spencer Arrighetti
26.3%
Hard-Hit % Allowedlg 40.0% · lower = better
Freddy Peralta
39.0%
Spencer Arrighetti
30.9%
Barrel % Allowedlg 8.0% · lower = better
Freddy Peralta
5.4%
Spencer Arrighetti
7.8%
xwOBA Allowedlg .315 · lower = better
Freddy Peralta
.303
Spencer Arrighetti
.344
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
Freddy Peralta
26.07
lg xERA 4.10
now 3.55
3.82
Spencer Arrighetti
26.07
lg xERA 4.10
now 1.34
4.72
WHIPlower is better
Freddy Peralta
1.021.52
now 1.30
1.37
Spencer Arrighetti
1.021.52
now 1.13
1.41

Volume · rest of season
Strikeoutshigher is better
Freddy Peralta
4078
now 68
63
Spencer Arrighetti
4078
now 43
50
Winshigher is better
Freddy Peralta
.00014.60
now 3
24
Spencer Arrighetti
.00014.60
now 7
511

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

If you already own them — trade angle
Hold · leans buyFreddy Peralta — hold.conf 0.60
Sell HighSpencer Arrighetti — sell high. His value is peaking; good time to trade him.conf 0.94
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