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Matthew O'Brien Sr
Simi Valley, CA| P| 6' 1"| Hit/Throw: L/L
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ERA4.75
W-L3-7
IP77.2
SO40
BB32
H86
Fielding
Columns
| 2026 | UC Riverside | 14 | 14 | 14 | 5 | 13 | 18 | 0 | 100.00% | 0 | 0 | 10 | 1 | 0 | 1.29 |
| 2025 | UC Riverside | 20 | 12 | 20 | 6 | 12 | 18 | 0 | 100.00% | 0 | 0 | 6 | 2 | 2 | 0.90 |
| 2024 |  Hawaii Hilo | 7 | 7 | 7 | 1 | 6 | 8 | 1 | 87.50% | 0 | 0 | 8 | 1 | 0 | 1.00 |
| 2023 | Hawaii Hilo | 14 | 3 | 14 | 0 | 8 | 10 | 2 | 80.00% | 0 | 0 | 0 | 0 | 0 | 0.57 |
Pitching
Columns
| 2026 | UC Riverside | 14 | 14 | 14 | 4.75 | 77.2 | 1 | 86 | 51 | 41 | 32 | 40 | 0 | 359 | 307 | 18 | 0 | 1 | 10 | 4 | 8 | 1 | 9 | 3 | 3 | 7 | 0 | 2 |
| 2025 | UC Riverside | 12 | 20 | 20 | 6.75 | 62.2 | 0 | 80 | 50 | 47 | 24 | 49 | 0 | 292 | 253 | 14 | 4 | 0 | 6 | 2 | 8 | 0 | 4 | 3 | 4 | 5 | 1 | 3 |
| 2024 | Hawaii Hilo | 7 | 7 | 7 | 2.70 | 36.2 | 3 | 31 | 21 | 11 | 13 | 34 | 0 | 161 | 145 | 5 | 1 | 0 | 3 | 3 | 2 | 0 | 0 | 1 | 3 | 2 | 0 | 2 |
| 2023 | Hawaii Hilo | 3 | 14 | 14 | 2.82 | 22.1 | 0 | 21 | 12 | 7 | 14 | 12 | 0 | 101 | 78 | 3 | 0 | 0 | 0 | 2 | 4 | 0 | 5 | 0 | 1 | 1 | 0 | 5 |