MLB Daily DeltaWeek 19 · July 31, 2026
Portrait of Joe Mack
Joe Mack
MIA · C
Change to
Portrait of Tyler Stephenson
Tyler Stephenson
CIN · C
Change to
Who's more valuable, rest of season

Too close to call.

They split your categories 11, 3 even. Take whoever fills a bigger need.

Head-to-head
HR
R
RBI
SB
AVG

Joe Mack wins 1 (R); Tyler Stephenson wins 1 (RBI); 3 even.

04

Under the hood

Underlying skill — each value vs league avg
Avg Exit Velolg 89.0 · higher = better
Joe Mack
89.1
Tyler Stephenson
91.0
Hard-Hit %lg 40.0% · higher = better
Joe Mack
40.6%
Tyler Stephenson
45.7%
Barrel %lg 8.0% · higher = better
Joe Mack
10.1%
Tyler Stephenson
11.3%
Chase %lg 28.5% · lower = better
Joe Mack
26.7%
Tyler Stephenson
22.3%
Swinging-Strike %lg 11.0% · lower = better
Joe Mack
11.7%
Tyler Stephenson
11.8%
xwOBAlg .315 · higher = better
Joe Mack
.317
Tyler Stephenson
.345
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 · batting average
AVGhigher is better
Joe Mack
.200.260
lg AVG .295
now .209
.240
Tyler Stephenson
.200.260
lg AVG .295
now .193
.241

Volume · counting stats
Home Runshigher is better
Joe Mack
55.60
now 0
3
Tyler Stephenson
55.60
now 4
3
Runshigher is better
Joe Mack
2015.20
now 7
12
Tyler Stephenson
2015.20
now 11
9
RBIhigher is better
Joe Mack
2021.40
now 6
10
Tyler Stephenson
2021.40
now 17
14
Stolen Baseshigher is better
Joe Mack
.0001.20
now 0
0
Tyler Stephenson
.0001.20
now 0
0
If you already own them — trade angle
Hold · steadyJoe Mack — hold.conf 0.60
BuyTyler Stephenson — buy.conf 0.66
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