Skip to main content
MLB Deserve-to-Win
← All pitchers·All hitters

Seth Johnson

2026
Athletics· RHP · throws R· 33.2 IP· 5.88 ERA· 1.69 WHIP· 158 batters faced
Compare

Grade

His grade shows how good he has been, and at what.
Fbetter than 23% of qualified pitchers at limiting bases
RelieverStill Searching

Below league average across the board.

Johnson allows more bases than most pitchers

The simulator expects him to allow 0.470 bases per batter faced, better than 23% of qualified pitchers. His weakest skill is limiting walks (18th percentile). Short relief outings push strikeout rates up a little, so read his K% spoke with that in mind.

His grade rests on 158 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.

Plays like…

Each of these pitchers shares his archetype and sits closest to him in xEB/PA. Pick one to see him side by side with Seth Johnson.

Isaac MattsonPiratesPierce JohnsonRedsAdam MackoRangersAnthony BandaTwins

Pitcher type

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

Pitcher type

He lands in the “Hit hard, few strikeouts” corner of the map.

League best:K% − BB% Jacob Misiorowski (26.8%)Hard-hit% allowed Blake Snell (29.0%)

How to read this chart
Two skills separate pitching styles: strikeout rate minus walk rate, where higher is better, and hard-hit rate allowed, where lower is better. The hard-hit axis is flipped, so the best corner is the top right. Each dot is a pitcher with 80+ batters faced this season, sized by batters faced. The dashed lines are the league median on each skill, and the league best on each is named above the chart. Click any dot to open that pitcher's page.
 Seth JohnsonLeague medianPercentile
Bases per ball in play(lower = better).608.527—
Walk rate(lower = better)11%9%18th
Strikeout rate(higher = better)23%22%64th

A higher percentile is better, and the 99th is the top of the league.

Arsenal

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

Seth Johnson leans on his four-seam fastball (46% of pitches). His four-seam fastball has performed closest to league average, and his four-seam fastball runs 2.6 mph faster than the median right-handed pitcher's.

Pitch mix & swing-and-miss

+7 bases better than a replacement arm this season

He allowed about 76 estimated bases, against a replacement arm's 82 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 cost 8.5 bases against league average across 545 pitches, or 1.6 per 100 pitches.

Four-Seam Fastball
46%
97.7 mph · RHP median 95.1
27% whiffs · Lg median 21%
cost 0.1 per 1000.2 total
Slider
34%
88.3 mph · RHP median 86.9
32% whiffs · Lg median 33%
cost 2.9 per 1006.1 total
Sinker
9%
95.5 mph · RHP median 94.7
—
cost 4.0 per 1002.2 total
Curveball
not charted
6%
82.4 mph · RHP median 81.2
—
—
Sweeper
not charted
4%
84.7 mph · RHP median 83.5
—
—

His curveball and sweeper aren't in the charts below, because too few of each were tracked this season.

He rarely throws his splitter (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.

Mix by batter side

Compared with the league, his slider tilts 16 points more toward lefties.

Four-Seam Fastball
51% vs LHH · RHP median 40%
44% vs RHH · RHP median 33%
Slider
38% vs LHH · RHP median 20%
32% vs RHH · RHP median 30%
How to read this chart
Each row shows how often he throws a pitch to left-handed hitters (LHH) and right-handed hitters (RHH), next to the median for pitchers of his hand (RHP median). Medians come from right-handed pitchers who throw that pitch at least 3% of the time. Between 217 and 384 of them qualify, depending on the pitch. A mix is a plan, so a higher or lower share is neither better nor worse. Overall results by batter side are under Platoon splits.

Seth Johnson's pitch movement, 2026

His Four-Seam Fastball and Slider have moved 2+ inches from their early-season shapes.

The verdict above compares each pitch with his own early-season outings in 2026, not with other pitchers, after taking out the league-wide drift in break.

Seth Johnson's pitch movement, 20260612061218in← glove sidearm side →more risemore drop
Four-Seam FastballFF
Rise 16.9 in
+1.2 vs Lg median
Break 9.5 in
+1.8 vs Lg median
Vs. early season changed
SliderSL
Rise 4.0 in
+2.2 vs Lg median
Break −3.3 in
+0.4 vs Lg median
Vs. early season changed
SinkerSI
Rise 9.3 in
+1.0 vs Lg median
Break 15.1 in
−0.1 vs Lg median
Vs. early season steady
Early season → nowLg medianNormal wobble around the dot
How to read this chart
Each dot is a pitch's current break in inches, averaged over his latest outings. Higher is more rise and further right is more arm-side break, and neither is better or worse. The faint trail runs from his early-season outings to the dot, and the soft halo shows how far normal noise can move it. League median is the small hollow ring, and a pitch marked * has none because too few pitchers throw it. The “changed” verdict removes a league-wide drift that the trail still shows, so a long trail can read as steady. The by-appearance chart below has the exact dates. More on the About page

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. His curveball and sweeper aren't in these charts, because too few of each were tracked this season.

Platoon splits

This section splits his results against lefties and righties.

Platoon splits (EB/PA allowed)

He handles righty bats better than lefty bats, by 0.042 EB/PA allowed.

50% probable range: +0.034 to +0.050

vs LHB71 PA0.454

vs LHB: shrunk estimate 0.454 EB/PA, 50% probable range 0.433 to 0.475, based on 71 plate appearances. Raw (unshrunk) rate: 0.546 EB/PA. League median vs LHB: 0.451 EB/PA.

His raw rate vs LHB (0.546) 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 RHB87 PA0.413

vs RHB: shrunk estimate 0.413 EB/PA, 50% probable range 0.392 to 0.433, based on 87 plate appearances. Raw (unshrunk) rate: 0.472 EB/PA. League median vs RHB: 0.435 EB/PA.

0.3820.4080.4340.4590.485
← betterworse →
Below league medianAbove50% probable rangeHis raw rateMiddle half of the league

His split is about typical for a righty arm (median 0.042).

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, and that's also where they do the most damage.

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 Seth Johnson this season is drawn where it landed.
hit · out
EBlowhigh
vs JJ BledayHome run
105 mph · 34° · worth 3.8 bases
08/06 vs Reds
vs José RamírezHome run
102 mph · 29° · worth 3.6 bases
09/18 vs Guardians
vs Curtis MeadHome run
99 mph · 28° · worth 3.4 bases
06/22 vs Nationals
vs Junior CamineroHome run
105 mph · 22° · worth 3.0 bases
08/10 vs Rays
vs Cedric MullinsOutLucky out
101 mph · 41° · worth 2.9 bases
08/12 vs Rays

Luck check

2 outs behind him came on balls the simulator values at 1.5 bases or more.

vs Cedric MullinsOutLucky out
101 mph · 41° · worth 2.9 bases
08/12 vs Rays
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.

Deserved vs. actual

Batters have been credited with about 5 more bases than their contact off Seth Johnson deserved, so his results have been unlucky so far.

Deserved by the contact he allowed58
Actually credited to batters63

Both bars count 95 balls in play, with walks and strikeouts left out.

How to read this chart
Every ball in play is worth the bases its exit velocity, launch angle and direction usually produce. If batters were credited with more than that, his results have been unlucky, and fewer means lucky. BABIP against is the batting average on balls in play he allows, next to the league median.

ERA 5.88 · WHIP 1.69 · BABIP against 0.356 (Lg median 0.286)

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 · Seth Johnson

Compared with last season, his HR allowed% is down, his BB% is up and his K% is down.

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