One pitch of his moves in a way hitters rarely see
Mattson's 4-seam fastball carries 17.8 inches of ride against a spinless ball, the biggest vertical move in his arsenal.
262 thrown, averaging 93.8 mph.
He pitches around the zone once runners are on
Mattson throws 38.7% of his pitches in the zone with a runner in scoring position and 47% with the bases empty.
119 pitches with a runner in scoring position, 198 with the bases empty.
His pitches move in ways that fit together
Mattson works with 3 pitches: 4-Seam Fastball, Changeup and Curveball. The 4-seam fastball is 82.6% of everything he throws.
317 classified pitches in 2026.
He throws about as hard as anybody in the league
Mattson averages 92.3 mph across his arsenal, 85th percentile in the league.
317 pitches in 2026. 85th percentile among qualified pitchers in 2026, 84th in MLB.
The contact he allows is the kind that finds grass
The quality of contact against Mattson projects a .390 average, 6th percentile.
317 pitches in 2026. 6th percentile among qualified pitchers in 2026, 504th in MLB.
When he falls behind, hitters know exactly what is coming
Behind in the count Mattson throws a fastball 89% of the time, against 77.3% when he is ahead.
82 pitches behind in the count, 88 ahead.
He saves one pitch for one side of the plate
Mattson throws the changeup 19.5% of the time against left-handers and 0% against right-handers.
158 pitches to right-handers, 159 to left-handers.
Too much of the contact against him is loud
49.1% of the contact Mattson gives up is hit hard, 14th percentile.
317 pitches in 2026. 14th percentile among qualified pitchers in 2026, 463rd in MLB.
This is the pitch he goes to when he needs the out
With two strikes Mattson goes to the 4-seam fastball: 87.3% of his two-strike pitches, against 80.5% the rest of the time.
102 two-strike pitches in 2026.
He pitches differently depending on which hand is up
Mattson puts 45.6% of his pitches to right-handers in the zone and 42.1% of his pitches to left-handers.
158 pitches to right-handed hitters, 159 to left-handed hitters.
He works one part of the zone far more than the rest
Mattson lives up in the zone: his average pitch crosses at 2.67 feet, against a zone that runs 1.5 to 3.5.
317 located pitches in 2026.
He gets so far down the mound the ball arrives early
Mattson releases the ball 6.7 feet down the mound, so the ball arrives sooner than the radar gun suggests.
231 tracked pitches in 2026.
When hitters connect off him, they hit it hard
Hitters average 90.7 mph off the bat against Mattson, 20th percentile.
317 pitches in 2026. 20th percentile among qualified pitchers in 2026, 432nd in MLB.
One pitch of his runs sideways more than almost anyone's
Mattson's 4-seam fastball moves 9.9 inches toward the third-base side, the biggest horizontal move in his arsenal.
262 thrown, averaging 93.8 mph.
He lives on one side of the plate
Mattson works away from right-handers: his average pitch lands 1.5 inches to that side of the middle of the plate.
317 located pitches in 2026.
How much of the zone he uses depends on the count
Mattson puts 59.8% of his pitches in the zone when he is behind and 48.9% when he is ahead.
82 located pitches behind, 88 ahead.
His fastball is the pitch everything else is built on
Mattson's 4-seam fastball averages 93.8 mph, and has touched 97.2.
262 thrown, 82.6% of his pitches.
He lives on the edges rather than over the middle
21.5% of Mattson's pitches land in the middle third of the zone, well below what most pitchers give away.
68 of 317 located pitches.
One pitch of his spins more than almost anyone's
Mattson's 4-seam fastball spins at 2,339 rpm, the highest in his arsenal.
262 thrown in 2026.
He falls behind hitters far too often
Mattson throws a strike on the first pitch 58.4% of the time.
77 plate appearances started in 2026.
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The numbers behind these live in Pitch Data.
Take me there
One pitch of his moves in a way hitters rarely see
Mattson's 4-seam fastball carries 17.8 inches of ride against a spinless ball, the biggest vertical move in his arsenal.
262 thrown, averaging 93.8 mph.
One pitch of his runs sideways more than almost anyone's
Mattson's 4-seam fastball moves 9.9 inches toward the third-base side, the biggest horizontal move in his arsenal.
262 thrown, averaging 93.8 mph.
The numbers behind these live in Matchups.
Take me there
He pitches around the zone once runners are on
Mattson throws 38.7% of his pitches in the zone with a runner in scoring position and 47% with the bases empty.
119 pitches with a runner in scoring position, 198 with the bases empty.
The numbers behind these live in Pitch Data.
Take me there
His pitches move in ways that fit together
Mattson works with 3 pitches: 4-Seam Fastball, Changeup and Curveball. The 4-seam fastball is 82.6% of everything he throws.
317 classified pitches in 2026.
He saves one pitch for one side of the plate
Mattson throws the changeup 19.5% of the time against left-handers and 0% against right-handers.
158 pitches to right-handers, 159 to left-handers.
His fastball is the pitch everything else is built on
Mattson's 4-seam fastball averages 93.8 mph, and has touched 97.2.
262 thrown, 82.6% of his pitches.
One pitch of his spins more than almost anyone's
Mattson's 4-seam fastball spins at 2,339 rpm, the highest in his arsenal.
262 thrown in 2026.
The numbers behind these live in Pitch Data.
Take me there
He throws about as hard as anybody in the league
Mattson averages 92.3 mph across his arsenal, 85th percentile in the league.
317 pitches in 2026. 85th percentile among qualified pitchers in 2026, 84th in MLB.
The numbers behind these live in Spray Chart.
Take me there
The contact he allows is the kind that finds grass
The quality of contact against Mattson projects a .390 average, 6th percentile.
317 pitches in 2026. 6th percentile among qualified pitchers in 2026, 504th in MLB.
Too much of the contact against him is loud
49.1% of the contact Mattson gives up is hit hard, 14th percentile.
317 pitches in 2026. 14th percentile among qualified pitchers in 2026, 463rd in MLB.
When hitters connect off him, they hit it hard
Hitters average 90.7 mph off the bat against Mattson, 20th percentile.
317 pitches in 2026. 20th percentile among qualified pitchers in 2026, 432nd in MLB.
The numbers behind these live in Pitch Data.
Take me there
When he falls behind, hitters know exactly what is coming
Behind in the count Mattson throws a fastball 89% of the time, against 77.3% when he is ahead.
82 pitches behind in the count, 88 ahead.
This is the pitch he goes to when he needs the out
With two strikes Mattson goes to the 4-seam fastball: 87.3% of his two-strike pitches, against 80.5% the rest of the time.
102 two-strike pitches in 2026.
How much of the zone he uses depends on the count
Mattson puts 59.8% of his pitches in the zone when he is behind and 48.9% when he is ahead.
82 located pitches behind, 88 ahead.
He falls behind hitters far too often
Mattson throws a strike on the first pitch 58.4% of the time.
77 plate appearances started in 2026.
The numbers behind these live in Matchups.
Take me there
He pitches differently depending on which hand is up
Mattson puts 45.6% of his pitches to right-handers in the zone and 42.1% of his pitches to left-handers.
158 pitches to right-handed hitters, 159 to left-handed hitters.
The numbers behind these live in Pitch Data.
Take me there
He works one part of the zone far more than the rest
Mattson lives up in the zone: his average pitch crosses at 2.67 feet, against a zone that runs 1.5 to 3.5.
317 located pitches in 2026.
He lives on one side of the plate
Mattson works away from right-handers: his average pitch lands 1.5 inches to that side of the middle of the plate.
317 located pitches in 2026.
He lives on the edges rather than over the middle
21.5% of Mattson's pitches land in the middle third of the zone, well below what most pitchers give away.
68 of 317 located pitches.
The numbers behind these live in Pitch Data.
Take me there
He gets so far down the mound the ball arrives early
Mattson releases the ball 6.7 feet down the mound, so the ball arrives sooner than the radar gun suggests.
231 tracked pitches in 2026.
Pirates