Riley O'Brien ABQ
In 2026, Riley O'Brien posted an ABQ against of 1.65 (ABQ+ 97) over 277 plate appearances faced in MLB play. His page covers 5 MLB seasons (2021–2026) and 537 plate appearances faced. ABQ (At-Bat Quality) grades the quality of every plate appearance, not just its result; ABQ+ puts it on a 100 = league-average scale.
Open Riley O'Brien's full interactive ABQ page
MLB pitching by season (regular season)
| Season | Team | PA vs | IP | ABQ against | ABQ+ | ERA+ |
|---|---|---|---|---|---|---|
| 2021 | CIN | 9 | 1.1 | 3.76 | -32 | 43 |
| 2022 | SEA | 5 | 1.0 | 1.31 | 119 | |
| 2024 | STL | 46 | 8.0 | 1.41 | 114 | 38 |
| 2025 | STL | 200 | 48.0 | 1.33 | 124 | 198 |
| 2026 | STL | 277 | 64.0 | 1.65 | 97 | 97 |
Triple-A pitching by season
| Season | Team | PA vs | IP | ABQ against | ABQ+ |
|---|---|---|---|---|---|
| 2024 | Memphis Redbirds | 52 | 13.1 | 1.52 | 98 |
| 2025 | Memphis Redbirds | 86 | 19.1 | 0.70 | 155 |
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ABQ by Made The Cut. Updated 2026-10-24.