MLB Daily DeltaWeek 27 · September 27, 2026
351 PA · week 27
this weekHOLD
last weekHOLD

Yainer Diaz

HOU·C
data as of September 27, 2026·week 27
Hold · steady skill near league average (0.311); hold steady — skill tracks near league, no edge either way.med 0.60
ROSAVG .000HR 0R 0RBI 0SB 0

Diaz is a hold — league average with nothing pulling either way.

His expected wOBA is .311, essentially league average, and he has 351 plate appearances, well past the point where the number becomes reliable. His actual wOBA is .333, a bit above the expected mark, but his expected wOBA has been stepping down across the sample, so the surface line is not the trend to chase. His contact quality is right where the league sits: 89.1 mph average exit velocity, a 38.4% hard-hit rate, and 6.8% barrels. He strikes out 15.7% of the time, well below league, which lifts his batting average, but he walks only 3.4%, a trade that keeps his overall value near the middle. There is no signal to buy and none to sell. If you own him, keep him; if not, this is not where the edge is. Hold.

VS His Norm

  • Barrel %6.8%—−2.6% ▼vs his ~9.4% career norm

Drivers

  • xwobaSIGNALskill near league average (0.311)
metric · nowrolling trajectoryvs. leaguestabilized?
Avg Exit Velo89.1 mph
89.1 mph*
lg avg 89.0 mph ▲+0.1 mphvs his norm —
281 / 50 BBE
Hard-Hit %38.4%
38.4%*
lg avg 40.0% ▼−1.6%vs his norm —
281 / 50 BBE
Barrel %6.8%
norm6.8%*
lg avg 8.0% ▼−1.2%vs his norm −2.6% ▼
281 / 60 BBE
xwOBA.311
.311*
lg avg .315 ▼−.004vs his norm —
351 / 160 PA
wOBA.333
.333*
lg avg .315 ▲+.018vs his norm —
351 / 200 PA
Strikeout %15.7%
15.7%*
lg avg 22.0% ▼−6.3%vs his norm —
351 / 60 PA
Walk %3.4%
3.4%*
lg avg 8.5% ▼−5.1%vs his norm —
351 / 120 PA
BABIP.300
norm.300*
lg avg .295 ▲+.005vs his norm −.005 ▼BABIP is below his ~.305 norm — expect it to rise.
281 / 800 BIP
Swinging-Strike %12.7%
12.7%*
lg avg 11.0% ▲+1.7%vs his norm —
351 / 50 PA
Chase %42.1%
42.1%*
lg avg 28.5% ▲+13.6%vs his norm —
351 / 50 PA

5×5 ROS Outlook

rest of season

Where each category goes the rest of the way, and the skill that drives it. Tap a row to expand the full derivation.

statytdrosdriverconf
Barrel% 6.8%→7.9%signal0 HR — Barrel% 6.8% (signal) lifted to career ~9.4% → projected 7.9%.
BABIP 0.300→0.302 regressednoise.000 AVG — BABIP 0.300 is noise, regressed toward xBA-implied 0.303 (xBA 0.271) → 0.302.
on-base + lineup0 R — his run rate over ~0 projected PA.
slugging + lineup0 RBI — his RBI rate over ~0 projected PA.
run rate / role0 SB — his steal rate (0 in 26 G) over ~0 projected PA.
rosterdroprotational counting only

Every projection traces to a sabermetric input. The driver and confidence shown per row are always visible; tap any row to expand the full derivation.

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