He pitches differently depending on which hand is up
Klein puts 55.7% of his pitches to right-handers in the zone and 44.4% of his pitches to left-handers.
131 pitches to right-handed hitters, 171 to left-handed hitters.
His fastball is the pitch everything else is built on
Klein's 4-seam fastball averages 97.6 mph, and has touched 100.1.
151 thrown, 50% of his pitches.
He fills the strike zone and makes hitters beat him
Klein lives in the strike zone: 49.3% of his pitches are in it, 94th percentile.
302 pitches in 2026. 94th percentile among qualified pitchers in 2026, 34th in MLB.
One pitch of his moves in a way hitters rarely see
Klein's 4-seam fastball carries 15.3 inches of ride against a spinless ball, the biggest vertical move in his arsenal.
151 thrown, averaging 97.6 mph.
He saves one pitch for one side of the plate
Klein throws the sweeper 46.6% of the time against right-handers and 6.4% against left-handers.
131 pitches to right-handers, 171 to left-handers.
He throws about as hard as anybody in the league
Klein averages 92.5 mph across his arsenal, 87th percentile in the league.
302 pitches in 2026. 87th percentile among qualified pitchers in 2026, 69th in MLB.
The angle he throws from is unusual, and hitters notice
Klein releases the ball from a low three-quarters slot, about 33 degrees above horizontal and 1.7 feet to the third-base side of the rubber.
302 tracked release points, averaging 5.6 feet off the ground.
He gets ahead early and pitches from in front all night
Klein throws a strike on the first pitch 66.7% of the time.
78 plate appearances started in 2026.
His pitches move in ways that fit together
Klein works with 4 pitches: 4-Seam Fastball, Sweeper, Curveball and Slider. The 4-seam fastball is 50% of everything he throws.
302 classified pitches in 2026.
This is the pitch he goes to when he needs the out
With two strikes Klein goes to the sweeper: 29.2% of his two-strike pitches, against 21.6% the rest of the time.
89 two-strike pitches in 2026.
One pitch of his runs sideways more than almost anyone's
Klein's sweeper moves 11.7 inches toward the first-base side, the biggest horizontal move in his arsenal.
72 thrown, averaging 88.6 mph.
He leaves too much of it over the heart of the plate
23.2% of Klein's pitches land in the middle third of the zone, the part of the plate hitters do their damage on.
70 of 302 located pitches.
One type of hitter does all the damage against him
Hitters do their damage on his fastballs: a .360 expected average against them, against .321 on his breaking balls.
151 of his fastballs thrown.
The gap between his pitches is what makes them work
12.8 mph separates Klein's 4-seam fastball from his curveball, 97.6 against 84.8.
151 and 60 of them respectively.
He lives on one side of the plate
Klein works in on right-handers: his average pitch lands 2.1 inches to that side of the middle of the plate.
302 located pitches in 2026.
When he falls behind, hitters know exactly what is coming
Behind in the count Klein throws a fastball 57.3% of the time, against 47.9% when he is ahead.
82 pitches behind in the count, 94 ahead.
He pitches around the zone once runners are on
Klein throws 47.3% of his pitches in the zone with a runner in scoring position and 50.2% with the bases empty.
93 pitches with a runner in scoring position, 209 with the bases empty.
He gets so far down the mound the ball arrives early
Klein releases the ball 6.7 feet down the mound, so the ball arrives sooner than the radar gun suggests.
237 tracked pitches in 2026.
Almost nothing hit off him is hit well
Only 36% of the contact Klein gives up is hit hard, 67th percentile.
302 pitches in 2026. 67th percentile among qualified pitchers in 2026, 180th in MLB.
How much of the zone he uses depends on the count
Klein puts 64.6% of his pitches in the zone when he is behind and 53.2% when he is ahead.
82 located pitches behind, 94 ahead.
One pitch of his spins more than almost anyone's
Klein's sweeper spins at 2,427 rpm, the highest in his arsenal.
72 thrown in 2026.
The contact he allows is the kind that finds grass
The quality of contact against Klein projects a .340 average, 36th percentile.
302 pitches in 2026. 36th percentile among qualified pitchers in 2026, 345th in MLB.
When hitters connect off him, they hit it hard
Hitters average 89.2 mph off the bat against Klein, 38th percentile.
302 pitches in 2026. 38th percentile among qualified pitchers in 2026, 333rd in MLB.
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The numbers behind these live in Matchups.
Take me there
He pitches differently depending on which hand is up
Klein puts 55.7% of his pitches to right-handers in the zone and 44.4% of his pitches to left-handers.
131 pitches to right-handed hitters, 171 to left-handed hitters.
The numbers behind these live in Pitch Data.
Take me there
His fastball is the pitch everything else is built on
Klein's 4-seam fastball averages 97.6 mph, and has touched 100.1.
151 thrown, 50% of his pitches.
He saves one pitch for one side of the plate
Klein throws the sweeper 46.6% of the time against right-handers and 6.4% against left-handers.
131 pitches to right-handers, 171 to left-handers.
His pitches move in ways that fit together
Klein works with 4 pitches: 4-Seam Fastball, Sweeper, Curveball and Slider. The 4-seam fastball is 50% of everything he throws.
302 classified pitches in 2026.
The gap between his pitches is what makes them work
12.8 mph separates Klein's 4-seam fastball from his curveball, 97.6 against 84.8.
151 and 60 of them respectively.
One pitch of his spins more than almost anyone's
Klein's sweeper spins at 2,427 rpm, the highest in his arsenal.
72 thrown in 2026.
The numbers behind these live in Pitch Data.
Take me there
He fills the strike zone and makes hitters beat him
Klein lives in the strike zone: 49.3% of his pitches are in it, 94th percentile.
302 pitches in 2026. 94th percentile among qualified pitchers in 2026, 34th in MLB.
The numbers behind these live in Pitch Data.
Take me there
One pitch of his moves in a way hitters rarely see
Klein's 4-seam fastball carries 15.3 inches of ride against a spinless ball, the biggest vertical move in his arsenal.
151 thrown, averaging 97.6 mph.
One pitch of his runs sideways more than almost anyone's
Klein's sweeper moves 11.7 inches toward the first-base side, the biggest horizontal move in his arsenal.
72 thrown, averaging 88.6 mph.
The numbers behind these live in Pitch Data.
Take me there
He throws about as hard as anybody in the league
Klein averages 92.5 mph across his arsenal, 87th percentile in the league.
302 pitches in 2026. 87th percentile among qualified pitchers in 2026, 69th in MLB.
The numbers behind these live in Pitch Data.
Take me there
The angle he throws from is unusual, and hitters notice
Klein releases the ball from a low three-quarters slot, about 33 degrees above horizontal and 1.7 feet to the third-base side of the rubber.
302 tracked release points, averaging 5.6 feet off the ground.
He gets so far down the mound the ball arrives early
Klein releases the ball 6.7 feet down the mound, so the ball arrives sooner than the radar gun suggests.
237 tracked pitches in 2026.
The numbers behind these live in Pitch Data.
Take me there
He gets ahead early and pitches from in front all night
Klein throws a strike on the first pitch 66.7% of the time.
78 plate appearances started in 2026.
This is the pitch he goes to when he needs the out
With two strikes Klein goes to the sweeper: 29.2% of his two-strike pitches, against 21.6% the rest of the time.
89 two-strike pitches in 2026.
When he falls behind, hitters know exactly what is coming
Behind in the count Klein throws a fastball 57.3% of the time, against 47.9% when he is ahead.
82 pitches behind in the count, 94 ahead.
How much of the zone he uses depends on the count
Klein puts 64.6% of his pitches in the zone when he is behind and 53.2% when he is ahead.
82 located pitches behind, 94 ahead.
The numbers behind these live in Pitch Data.
Take me there
He leaves too much of it over the heart of the plate
23.2% of Klein's pitches land in the middle third of the zone, the part of the plate hitters do their damage on.
70 of 302 located pitches.
He lives on one side of the plate
Klein works in on right-handers: his average pitch lands 2.1 inches to that side of the middle of the plate.
302 located pitches 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 .360 expected average against them, against .321 on his breaking balls.
151 of his fastballs thrown.
The numbers behind these live in Matchups.
Take me there
He pitches around the zone once runners are on
Klein throws 47.3% of his pitches in the zone with a runner in scoring position and 50.2% with the bases empty.
93 pitches with a runner in scoring position, 209 with the bases empty.
The numbers behind these live in Spray Chart.
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Almost nothing hit off him is hit well
Only 36% of the contact Klein gives up is hit hard, 67th percentile.
302 pitches in 2026. 67th percentile among qualified pitchers in 2026, 180th in MLB.
The contact he allows is the kind that finds grass
The quality of contact against Klein projects a .340 average, 36th percentile.
302 pitches in 2026. 36th percentile among qualified pitchers in 2026, 345th in MLB.
When hitters connect off him, they hit it hard
Hitters average 89.2 mph off the bat against Klein, 38th percentile.
302 pitches in 2026. 38th percentile among qualified pitchers in 2026, 333rd in MLB.