His fastball is the pitch everything else is built on
Zeferjahn's 4-seam fastball averages 97.4 mph, and has touched 100.9.
415 thrown, 32.7% of his pitches.
The angle he throws from is unusual, and hitters notice
Zeferjahn releases the ball from a low three-quarters slot, about 27 degrees above horizontal and 2.1 feet to the third-base side of the rubber.
1271 tracked release points, averaging 5.6 feet off the ground.
One pitch of his moves in a way hitters rarely see
Zeferjahn's 4-seam fastball carries 15.5 inches of ride against a spinless ball, the biggest vertical move in his arsenal.
415 thrown, averaging 97.4 mph.
There is one pitch of his that keeps getting hit
Contact off Zeferjahn's 4-seam fastball leaves the bat at 93.9 mph, against 85.4 off his sweeper.
415 and 504 of them thrown.
The contact he allows should not turn into many hits
The quality of contact against Zeferjahn projects a .228 average, 98th percentile.
389 pitches in 2026. 98th percentile among qualified pitchers in 2026, 12th in MLB.
This is the pitch he goes to when he needs the out
With two strikes Zeferjahn goes to the 4-seam fastball: 40.6% of his two-strike pitches, against 29% the rest of the time.
404 two-strike pitches in 2026.
One pitch of his runs sideways more than almost anyone's
Zeferjahn's sweeper moves 14.8 inches toward the first-base side, the biggest horizontal move in his arsenal.
504 thrown, averaging 85.6 mph.
One type of hitter does all the damage against him
Hitters do their damage on his fastballs: a .266 expected average against them, against .207 on his breaking balls.
179 of his fastballs thrown.
Almost nothing hit off him is hit well
Only 30.4% of the contact Zeferjahn gives up is hit hard, 85th percentile.
389 pitches in 2026. 85th percentile among qualified pitchers in 2026, 80th in MLB.
One pitch of his spins more than almost anyone's
Zeferjahn's sweeper spins at 2,688 rpm, the highest in his arsenal.
504 thrown in 2026.
His ball moves more than the hitter expects it to
Zeferjahn's stuff spins at 2,412 rpm, 78th percentile in the league.
389 pitches in 2026. 78th percentile among qualified pitchers in 2026, 119th in MLB.
How much of the zone he uses depends on the count
Zeferjahn puts 52.2% of his pitches in the zone when he is behind and 35.5% when he is ahead.
370 located pitches behind, 352 ahead.
He works one part of the zone far more than the rest
Zeferjahn lives at the bottom of the zone: his average pitch crosses at 2.34 feet, against a zone that runs 1.5 to 3.5.
1271 located pitches in 2026.
He throws about as hard as anybody in the league
Zeferjahn averages 90.8 mph across his arsenal, 66th percentile in the league.
389 pitches in 2026. 66th percentile among qualified pitchers in 2026, 183rd in MLB.
His pitches move in ways that fit together
Zeferjahn works with 4 pitches: Sweeper, 4-Seam Fastball, Sinker and Slider. The sweeper is 39.7% of everything he throws.
1270 classified pitches in 2026.
He cannot find the zone often enough
Zeferjahn works off the plate, with only 41.6% of his pitches in the zone, 35th percentile.
389 pitches in 2026. 35th percentile among qualified pitchers in 2026, 352nd in MLB.
He gets so far down the mound the ball arrives early
Zeferjahn releases the ball 6.7 feet down the mound, so the ball arrives sooner than the radar gun suggests.
1143 tracked pitches in 2026.
He pitches around the zone once runners are on
Zeferjahn throws 39.8% of his pitches in the zone with a runner in scoring position and 42.3% with the bases empty.
103 pitches with a runner in scoring position, 286 with the bases empty.
The gap between his pitches is what makes them work
11.9 mph separates Zeferjahn's 4-seam fastball from his sweeper, 97.4 against 85.6.
415 and 504 of them respectively.
He lives on the edges rather than over the middle
18.6% of Zeferjahn's pitches land in the middle third of the zone, well below what most pitchers give away.
236 of 1271 located pitches.
He falls behind hitters far too often
Zeferjahn throws a strike on the first pitch 58.1% of the time.
298 plate appearances started in 2026.
He saves one pitch for one side of the plate
Zeferjahn throws the sinker 19.7% of the time against right-handers and 10.9% against left-handers.
694 pitches to right-handers, 576 to left-handers.
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The numbers behind these live in Pitch Data.
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His fastball is the pitch everything else is built on
Zeferjahn's 4-seam fastball averages 97.4 mph, and has touched 100.9.
415 thrown, 32.7% of his pitches.
There is one pitch of his that keeps getting hit
Contact off Zeferjahn's 4-seam fastball leaves the bat at 93.9 mph, against 85.4 off his sweeper.
415 and 504 of them thrown.
One pitch of his spins more than almost anyone's
Zeferjahn's sweeper spins at 2,688 rpm, the highest in his arsenal.
504 thrown in 2026.
His pitches move in ways that fit together
Zeferjahn works with 4 pitches: Sweeper, 4-Seam Fastball, Sinker and Slider. The sweeper is 39.7% of everything he throws.
1270 classified pitches in 2026.
The gap between his pitches is what makes them work
11.9 mph separates Zeferjahn's 4-seam fastball from his sweeper, 97.4 against 85.6.
415 and 504 of them respectively.
He saves one pitch for one side of the plate
Zeferjahn throws the sinker 19.7% of the time against right-handers and 10.9% against left-handers.
694 pitches to right-handers, 576 to left-handers.
The numbers behind these live in Pitch Data.
Take me there
The angle he throws from is unusual, and hitters notice
Zeferjahn releases the ball from a low three-quarters slot, about 27 degrees above horizontal and 2.1 feet to the third-base side of the rubber.
1271 tracked release points, averaging 5.6 feet off the ground.
He gets so far down the mound the ball arrives early
Zeferjahn releases the ball 6.7 feet down the mound, so the ball arrives sooner than the radar gun suggests.
1143 tracked pitches in 2026.
The numbers behind these live in Pitch Data.
Take me there
One pitch of his moves in a way hitters rarely see
Zeferjahn's 4-seam fastball carries 15.5 inches of ride against a spinless ball, the biggest vertical move in his arsenal.
415 thrown, averaging 97.4 mph.
One pitch of his runs sideways more than almost anyone's
Zeferjahn's sweeper moves 14.8 inches toward the first-base side, the biggest horizontal move in his arsenal.
504 thrown, averaging 85.6 mph.
The numbers behind these live in Spray Chart.
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The contact he allows should not turn into many hits
The quality of contact against Zeferjahn projects a .228 average, 98th percentile.
389 pitches in 2026. 98th percentile among qualified pitchers in 2026, 12th in MLB.
Almost nothing hit off him is hit well
Only 30.4% of the contact Zeferjahn gives up is hit hard, 85th percentile.
389 pitches in 2026. 85th percentile among qualified pitchers in 2026, 80th in MLB.
The numbers behind these live in Pitch Data.
Take me there
This is the pitch he goes to when he needs the out
With two strikes Zeferjahn goes to the 4-seam fastball: 40.6% of his two-strike pitches, against 29% the rest of the time.
404 two-strike pitches in 2026.
How much of the zone he uses depends on the count
Zeferjahn puts 52.2% of his pitches in the zone when he is behind and 35.5% when he is ahead.
370 located pitches behind, 352 ahead.
He falls behind hitters far too often
Zeferjahn throws a strike on the first pitch 58.1% of the time.
298 plate appearances started in 2026.
The numbers behind these live in Pitch Data.
Take me there
One type of hitter does all the damage against him
Hitters do their damage on his fastballs: a .266 expected average against them, against .207 on his breaking balls.
179 of his fastballs thrown.
The numbers behind these live in Pitch Data.
Take me there
His ball moves more than the hitter expects it to
Zeferjahn's stuff spins at 2,412 rpm, 78th percentile in the league.
389 pitches in 2026. 78th percentile among qualified pitchers in 2026, 119th in MLB.
The numbers behind these live in Pitch Data.
Take me there
He works one part of the zone far more than the rest
Zeferjahn lives at the bottom of the zone: his average pitch crosses at 2.34 feet, against a zone that runs 1.5 to 3.5.
1271 located pitches in 2026.
He lives on the edges rather than over the middle
18.6% of Zeferjahn's pitches land in the middle third of the zone, well below what most pitchers give away.
236 of 1271 located pitches.
The numbers behind these live in Pitch Data.
Take me there
He throws about as hard as anybody in the league
Zeferjahn averages 90.8 mph across his arsenal, 66th percentile in the league.
389 pitches in 2026. 66th percentile among qualified pitchers in 2026, 183rd in MLB.
The numbers behind these live in Pitch Data.
Take me there
He cannot find the zone often enough
Zeferjahn works off the plate, with only 41.6% of his pitches in the zone, 35th percentile.
389 pitches in 2026. 35th percentile among qualified pitchers in 2026, 352nd in MLB.
The numbers behind these live in Matchups.
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He pitches around the zone once runners are on
Zeferjahn throws 39.8% of his pitches in the zone with a runner in scoring position and 42.3% with the bases empty.
103 pitches with a runner in scoring position, 286 with the bases empty.
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