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Ken Waldichuk

2026
Nationals· LHP · throws L· 9.1 IP· 6.75 ERA· 1.50 WHIP· 41 batters faced

Grade

His grade shows how good he has been, and at what.
Reliever

His grade is not ready yet

The simulator does not have enough data yet to grade how well he limits bases.

His grade rests on 41 batters faced, with 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. Percentiles compare him with 517 qualified pitchers, those with 100+ batters faced, starters and relievers together. He has not reached that bar himself, so he is measured against them rather than counted among them.

Pitcher type

This map shows what kind of pitcher he is, next to the league.

Arsenal

These cards show what he throws and what each pitch does.

Ken Waldichuk mixes his curveball (42%) and four-seam fastball (33%). His best pitch has been the curveball, saving 0.4 bases per 100 thrown against league average.

Pitch mix & swing-and-miss

+2 bases better than a replacement arm this season

He allowed about 19 estimated bases, against a replacement arm's 21 over the same batters faced.

Replacement level is per-batter and can't be split by pitch type, so the bars below use league average.

All pitches

He saved 0.2 bases against league average across 61 pitches, or 0.3 per 100 pitches.

Curveball
42%
81.5 mph · LHP median 79.9
—
saved 0.4 per 1000.2 total
Four-Seam Fastball
not charted
33%
93.2 mph · LHP median 93.5
—
—
Cutter
not charted
18%
87.7 mph · LHP median 88.0
—
—
Sweeper
not charted
7%
84.9 mph · LHP median 81.2
—
—

Only his curveball is in the charts below, because the rest were tracked too rarely to plot.

He rarely throws his changeup (1% of his pitches).

How to read this chart
Each row is a pitch he throws at least 3% of the time, from pitch tracking in the regular season. The bar is how often he throws it, then its average velocity and its whiff rate, the share of swings that miss. Beside the velocity and the whiff rate is the median for that pitch, among pitchers of his hand for velocity and across the league for whiffs. More whiffs are better for a pitcher, while usage and velocity describe how he pitches. The Bases vs average bars score each pitch against a league-average pitch in the same count, and a bar to the left (saved) is better.

By appearance

These charts follow his velocity, movement and mix from outing to outing.

These charts follow his velocity, movement and pitch mix one outing at a time, and each pitch keeps the same color in every chart. The velocity and movement charts also shade the middle of the league for scale. Only his curveball is in these charts, because the rest were tracked too rarely to plot.

Platoon splits

This section splits his results against lefties and righties.

Platoon splits (EB/PA allowed)

He handles lefty bats better than righty bats, by 0.038 EB/PA allowed.

50% probable range: +0.030 to +0.047

vs LHB19 PA0.470

vs LHB: shrunk estimate 0.470 EB/PA, 50% probable range 0.448 to 0.493, based on 19 plate appearances. Raw (unshrunk) rate: 0.481 EB/PA. League median vs LHB: 0.451 EB/PA.

vs RHB21 PA0.508

vs RHB: shrunk estimate 0.508 EB/PA, 50% probable range 0.486 to 0.531, based on 21 plate appearances. Raw (unshrunk) rate: 0.547 EB/PA. League median vs RHB: 0.435 EB/PA.

His raw rate vs RHB (0.547) 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.

0.4240.4530.4830.5120.542
← betterworse →
Below league medianAbove50% probable rangeHis raw rateMiddle half of the league

His split is about typical for a lefty arm (median 0.038). He allows more than the league median against both sides.

How to read this chart
  • Each dot is his estimate against that side, with its 50% probable range as the bar. These are bases allowed, so lower 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 pitchers with 100 or more batters faced.
  • The two splits average back to his modeled overall EB/PA allowed, not the xEB/PA headline.
  • Tap or hover a mark for its number. LHB and RHB are left- and right-handed batters. More on the About page

Contact allowed

These cards show what hitters do when they make contact.

Batters go to the pull side off him most often, but they do the most damage up the middle.

Pull side and opposite field depend on which side each batter hits from, so this pools every hitter he faced.

Batted balls allowed

Every ball hit off Ken Waldichuk this season is drawn where it landed.
hit · out
EBlowhigh
vs Ramón UríasHome run
107 mph · 26° · worth 3.6 bases
04/06 vs Cardinals
vs Kyle TuckerHome run
102 mph · 33° · worth 3.0 bases
04/03 vs Dodgers
vs Jordan WalkerHome run
104 mph · 32° · worth 2.0 bases
04/06 vs Cardinals
vs Jake BauersSingle
111 mph · 7° · worth 1.1 bases
04/12 vs Brewers
vs Matt ShawOut
71 mph · 18° · worth 0.7 bases
03/28 vs Cubs
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 his defense ran down. Tap or hover a dot or a row to link the two, and use the ▶ links to watch a play on Baseball Savant.

Times through the order

These charts show what happens as hitters see him a second and third time.

Best games

These are his biggest outings this season.

Best games

These are his best outings this season, ranked by bases saved against a replacement arm.

Multi-season trends · Ken Waldichuk

Compared with his previous season, his HR allowed% is up and his BB% is up.

Actual rates show what happened on the field, season by season.