Player

Riley O'Brien

STLPBats RThrows RActive

Season

Matchup

Pitcher DNA

Season identity from stored cubes. Open Fingerprint.

Mix

57.7%

Velocity

92.3 mph

Research indexes

Research scores for 2026. Open Metrics for the decompositions. Not a recommendation.

Pitch Shape

Confidence: HIGH
Pitches: 1,041
Stability: 83.3%

Command

Confidence: HIGH
Pitches: 1,030
Stability: 61.4%

Deception

Confidence: MED
Pitches: 1,041
Stability: 0.0%

Execution

Confidence: MED
Pitches: 1,030
Stability: 41.9%

Arsenal Synergy

Confidence: LOW
Pitches: 1,041
Stability: 0.0%

Mechanical Consistency

Confidence: HIGH
Pitches: 1,041
Stability: 99.1%

Pitch Predictability

Confidence: HIGH
Sequences: 776
Stability: 88.7%

Arsenal Separation

Confidence: HIGH
Pitches: 1,041
Stability: 100.0%

Pitcher Adaptability

Confidence: MED
Pitches: 1,041
Stability: 12.6%

Pitch Shape2840 pctl
Command2870 pctl
Deception508 pctl
Execution3514 pctl
Arsenal Synergy3699 pctl
Mechanical Consistency6072 pctl
Pitch Predictability4797 pctl
Arsenal Separation4899 pctl
Pitcher Adaptability861 pctl

Season neighbors

Archetype and nearest neighbor for 2026 (Overall). Open Similar. Not a recommendation.

Archetype

slider-heavy / high-csw

Nearest

Juan Mejia

ERA

4.21

FIP

4.03

WHIP

1.31

23.0%

BB%

10.8%

K-BB%

12.2%

League percentiles

Qualified pitchers, 2026 (50 IP).

ERA4.2135 pctl
FIP4.0350 pctl
WHIP1.3138 pctl
K%23.0%56 pctl
BB%10.8%18 pctl
K-BB%12.2%42 pctl

Season-over-season

ERA vs FIP across seasons.

Season line

Innings from outs; FIP uses strikeouts, walks, HBP, and home runs.

Year	G	IP	SO	BB	ERA	FIP
2026	64	62.0	62	29	4.21	4.03
2025	42	48.0	45	22	2.06	3.61
2024	8	8.0	11	8	11.25	7.04
2022	1	1.0	1	1	0.00	4.11
2021	1	1.1	2	3	13.50	26.42