The shape of the contact off him says how he gets outs
63.6% of the contact against O'Brien is on the ground and 16.4% of it is in the air.
55 tracked batted balls allowed.
Both sides hit him about the same
66.7% of the contact right-handers make against O'Brien is hit hard, against 23.5% of what left-handers make.
155 pitches to right-handed hitters, 182 to left-handed hitters.
Runners on base do not change how he is hit
55.6% of the contact against O'Brien with a runner in scoring position is hit hard, against 37% with the bases empty.
73 pitches with a runner in scoring position, 264 with the bases empty.
He handles both hands about the same
Right-handed hitters project to a .394 average against O'Brien and left-handers to .258.
155 pitches to right-handed hitters, 182 to left-handed hitters.
There is one pitch of his that keeps getting hit
Contact off O'Brien's slider leaves the bat at 95.2 mph, against 86.2 off his sinker.
44 and 196 of them thrown.
One side of the plate does most of the damage against him
Right-handed hitters average 93.6 mph off the bat against O'Brien and left-handers 82.5.
21 tracked batted balls from right-handers, 34 from left-handers.
He throws about as hard as anybody in the league
O'Brien averages 93.3 mph across his arsenal, 92nd percentile in the league.
337 pitches in 2026. 92nd percentile among qualified pitchers in 2026, 44th in MLB.
Hitters cannot square him up, the contact is weak
Contact against O'Brien is weak: 86.7 mph off the bat on average, 74th percentile.
337 pitches in 2026. 74th percentile among qualified pitchers in 2026, 140th in MLB.
One type of hitter does all the damage against him
Hitters do their damage on his fastballs: a .320 expected average against them, against .268 on his breaking balls.
196 of his fastballs thrown.
Hitters tend to hit him to one part of the field
45.5% of the balls put in play against O'Brien have gone to centre field.
25 of 55 located batted balls allowed.
The contact he allows should not turn into many hits
The quality of contact against O'Brien projects a .310 average, 64th percentile.
337 pitches in 2026. 64th percentile among qualified pitchers in 2026, 192nd in MLB.
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The numbers behind these live in Pitch Data.
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The shape of the contact off him says how he gets outs
63.6% of the contact against O'Brien is on the ground and 16.4% of it is in the air.
55 tracked batted balls allowed.
One side of the plate does most of the damage against him
Right-handed hitters average 93.6 mph off the bat against O'Brien and left-handers 82.5.
21 tracked batted balls from right-handers, 34 from left-handers.
Hitters tend to hit him to one part of the field
45.5% of the balls put in play against O'Brien have gone to centre field.
25 of 55 located batted balls allowed.
The numbers behind these live in Matchups.
Take me there
Both sides hit him about the same
66.7% of the contact right-handers make against O'Brien is hit hard, against 23.5% of what left-handers make.
155 pitches to right-handed hitters, 182 to left-handed hitters.
He handles both hands about the same
Right-handed hitters project to a .394 average against O'Brien and left-handers to .258.
155 pitches to right-handed hitters, 182 to left-handed hitters.
The numbers behind these live in Matchups.
Take me there
Runners on base do not change how he is hit
55.6% of the contact against O'Brien with a runner in scoring position is hit hard, against 37% with the bases empty.
73 pitches with a runner in scoring position, 264 with the bases empty.
The numbers behind these live in Pitch Data.
Take me there
There is one pitch of his that keeps getting hit
Contact off O'Brien's slider leaves the bat at 95.2 mph, against 86.2 off his sinker.
44 and 196 of them thrown.
The numbers behind these live in Pitch Data.
Take me there
He throws about as hard as anybody in the league
O'Brien averages 93.3 mph across his arsenal, 92nd percentile in the league.
337 pitches in 2026. 92nd percentile among qualified pitchers in 2026, 44th in MLB.
The numbers behind these live in Spray Chart.
Take me there
Hitters cannot square him up, the contact is weak
Contact against O'Brien is weak: 86.7 mph off the bat on average, 74th percentile.
337 pitches in 2026. 74th percentile among qualified pitchers in 2026, 140th in MLB.
The contact he allows should not turn into many hits
The quality of contact against O'Brien projects a .310 average, 64th percentile.
337 pitches in 2026. 64th percentile among qualified pitchers in 2026, 192nd in MLB.
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 .320 expected average against them, against .268 on his breaking balls.
196 of his fastballs thrown.
Cardinals