MLB Daily DeltaWeek 25 · September 10, 2026
AJ Smith-Shawver
ATL · P
Change to
Portrait of Martín Pérez
Martín Pérez
ATL · P
Change to
Who's more valuable, rest of season

AJ Smith-Shawver.

He projects to help you in more roto categories the rest of the way — strikeouts, ERA, and WHIP. Martín Pérez’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

AJ Smith-Shawver wins 3 categories (K, ERA, WHIP); Martín Pérez wins 1 (W); SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
AJ Smith-Shawver
96.0
Martín Pérez
89.9
Swinging-Strike %lg 11.0% · higher = better
AJ Smith-Shawver
11.5%
Martín Pérez
9.4%
Strikeout %lg 22.0% · higher = better
AJ Smith-Shawver
17.5%
Martín Pérez
18.0%
Chase %lg 28.5% · higher = better
AJ Smith-Shawver
28.9%
Martín Pérez
26.9%
Hard-Hit % Allowedlg 40.0% · lower = better
AJ Smith-Shawver
38.0%
Martín Pérez
38.1%
Barrel % Allowedlg 8.0% · lower = better
AJ Smith-Shawver
8.5%
Martín Pérez
5.4%
xwOBA Allowedlg .315 · lower = better
AJ Smith-Shawver
.336
Martín Pérez
.334
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
AJ Smith-Shawver
2.105.21
lg xERA 4.10
now 4.15
4.10
Martín Pérez
2.105.21
lg xERA 4.10
now 2.79
4.52
WHIPlower is better
AJ Smith-Shawver
.9301.52
now 1.38
1.30
Martín Pérez
.9301.52
now 1.06
1.39

Volume · rest of season
Strikeoutshigher is better
AJ Smith-Shawver
4057.20
now 4
10
Martín Pérez
4057.20
now 42
9
Winshigher is better
AJ Smith-Shawver
.0004.20
now 0
00
Martín Pérez
.0004.20
now 3
01

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

If you already own them — trade angle
Hold · wait & seeAJ Smith-Shawver — hold.conf 0.50
Sell HighMartín Pérez — sell high. His value is peaking; good time to trade him.conf 0.95
Tweet