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Junior Perez

2026
White Sox· CF · bats R · throws R· 36 plate appearances

Grade

His grade shows how good he has been, and at what.
Cbetter than 44% of hitters at creating bases
Aggressive Power

Big pop, rarely takes a walk.

Makes some of the hardest contact around

Junior Perez squares the ball up. He hits it hard more often than 77% of qualified hitters. The strikeouts pile up, though. Only 4% of qualified hitters strike out more often. This is an early read, on only 36 plate appearances so far.

36 plate appearances · data through 2026-09-27.

How to read this chart
Each spoke is a skill estimate adjusted for sample size, not a raw season stat, and farther out is better. A ↓ marks a stat where a lower number is better, and its spoke is flipped so farther out still means better. The middle ring marks the league median and the outer ring the league best. EB/PA is estimated bases, HR% home runs, BB% walks and K% strikeouts, each per plate appearance, and Hard-hit% is balls hit 95 mph or harder. Percentiles compare him with 534 qualified hitters, the ones with 50 or more plate appearances. He hasn't reached that bar himself, so he is measured against them rather than counted among them.

Plays like…

Each of these hitters shares his archetype and sits closest to him in EB/PA.

Trea TurnerPhilliesGage WorkmanPadresWenceel PérezTigersVictor BericotoGiants

Hitter type

See what kind of hitter he is, next to the rest of the league.

Platoon splits

See how he hits left-handed and right-handed pitchers.

Platoon splits (EB/PA)

He hits lefties better than righties, by 0.015 EB/PA.

50% probable range: -0.010 to +0.042

That interval crosses zero, so the simulator can’t confidently say which side he’s actually better against.

vs LHP27 PA0.435

vs LHP: shrunk estimate 0.435 EB/PA, 50% probable range 0.406 to 0.466, based on 27 plate appearances. Raw (unshrunk) rate: 0.209 EB/PA. League median vs LHP: 0.424 EB/PA.

His raw rate vs LHP (0.209) is off this scale. Small samples can push a raw rate this far, which is why the dot, the shrunk estimate, is the number to trust.

vs RHP9 PA0.419

vs RHP: shrunk estimate 0.419 EB/PA, 50% probable range 0.391 to 0.447, based on 9 plate appearances. Raw (unshrunk) rate: 0.958 EB/PA. League median vs RHP: 0.433 EB/PA.

His raw rate vs RHP (0.958) is off this scale. Small samples can push a raw rate this far, which is why the dot, the shrunk estimate, is the number to trust.

0.3820.4050.4290.4520.475
← worsebetter →
Above league medianBelow50% probable rangeHis raw rateMiddle half of the league

His split is narrower than the typical righty bat's (median 0.035). Against righties he sits below the league median, which is a real platoon weakness.

He sits in the league's middle half vs both lefties and righties.

How to read this chart
  • Each dot is his estimate against that hand, with its 50% probable range as the bar. Higher is better.
  • The diamond is his raw rate, which small samples make noisy, so the simulator pulls the dot toward a more trustworthy value.
  • The dashed tick is the league median, and the shaded strip is the middle half of hitters with 50 or more plate appearances.
  • Tap or hover a mark for its number. LHP and RHP are left- and right-handed pitchers. More on the About page

How he hits

See what his contact is worth and what pitchers throw him.

He hits the ball up the middle most often, but does his most damage to the pull side.

Best batted balls

Every ball Junior Perez put in play this season is drawn where it landed.
hit · out
EBlowhigh
vs Miguel UllolaHome run
107 mph · 24° · worth 3.6 bases
07/26 vs Astros
vs Trey GibsonHome run
106 mph · 25° · worth 3.5 bases
06/30 vs Orioles
vs Jake BennettOut
104 mph · 31° · worth 1.4 bases
07/08 vs Red Sox
vs Payton TolleOut
96 mph · 39° · worth 1.0 bases
07/07 vs Red Sox
vs Tarik SkubalHome run
102 mph · 21° · worth 1.0 bases
06/19 vs Tigers
How to read this chart
Dot color is estimated bases (EB), what the contact was worth no matter what the defense did with it. Darker means more bases, so a dark hollow ring in the outfield is a crushed ball that got caught. Tap or hover a dot or a row to link the two, and use the ▶ links to watch a play on Baseball Savant.

Performance by pitch type

2026 · 139 pitches

Each row shows the bases he adds per 100 pitches of one type, against the league.

← below league medianabove league median →
Four-Seam Fastball (53 pitches)
−4.5
Lg median −0.4Lg best +8.7
Other (86 pitches)

+0.4 bases per 100 · no single-type league comparison

Above league medianBelowMiddle half of the leagueLg medianLg best
How to read this chart
Each row is the bases he adds per 100 pitches of that type, on the same scale as the pitcher pages’ “saved/cost per 100” but from the hitter’s side. Every pitch counts. Taking a ball adds value, whiffing loses it, and the pitch that ends the plate appearance scores its outcome against what that count usually produces. A value of +3.5 means his results against that pitch have been worth about 3.5 extra bases per 100 seen. Higher is better. Types with fewer than 50 pitches seen pool into “Other”.

Swing

See how fast he swings and what he changes with two strikes. League tracking starts in 2024.

Swing at a glance

2026 · data through 2026-09-27
Bat speed · 68 swings
74.4 mph
Lg median 71.1 mph
Slowest: S. Kwan (61.8 mph)Fastest: J. Caminero (78.4 mph)
Lg median

He swings faster than most hitters. His swing length and attack angle both sit in the league's middle range. With two strikes, he changes his bat speed less than most hitters. His bat travels on a flatter path than most.

Attack angle
10.6°
Lg median 9.6°
Swing length
7.5 ft
Lg median 7.3 ft
Swing path tilt
27.5°
Lg median 31.4°
Middle half of the league
How to read this chart
  • Bat speed counts competitive swings only, so bunts and check swings under 50 mph are left out.
  • Swing length is how far the sweet spot of the bat travels during the swing. Attack angle is the bat’s upward or downward tilt through the zone.
  • Swing path tilt is how steep the bat’s path is.
  • None of these is better or worse on its own. Swing style trades power against contact, and the fastest and slowest swings in the league both belong to stars. More on the About page

Best games

These are his biggest games this season.

Best games

These are his best games this season, ranked by bases above replacement.