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Riley O'Brien 2027 Fantasy Projections
Dynasty value: $1 · #365 of 552 by multi-year value · Dynasty rankings
2027 season projections from RotoHound, updated October 10, 2026. Dollar values below are calculated separately for each league format, so the same player is priced differently in a Yahoo 5x5 league than in an Ottoneu 4x4 league.
RotoHound projects Riley O'Brien for 59 strikeouts, 16 saves and a 3.86 ERA across 61 innings for the 2027 season. His highest value is in Ottoneu 5x5 leagues, where he is priced at $7 and ranked #214.
Riley O'Brien projected pitching
| Season | IP | GS | W | SV | HLD | K | BB | ERA | WHIP |
|---|---|---|---|---|---|---|---|---|---|
| 2027 season | 60.8 | 0 | 4 | 16 | 8 | 59 | 26 | 3.86 | 1.32 |
| 2026 actual | 64.0 | 0 | 3 | 38 | 1 | 64 | 29 | 4.08 | 1.28 |
Riley O'Brien rest-of-season value by league format
Rank is among all players priced in that format, and links to the full rankings where a public board exists. Value is the rest-of-season dollar value RotoHound calculates for a standard league of that type. Import your own league to price Riley O'Brien against your exact roster slots, scoring categories, and salary cap.
Riley O'Brien MLB pitching by season (since 2015)
| Season | IP | GS | W | SV | HLD | K | BB | ERA | WHIP |
|---|---|---|---|---|---|---|---|---|---|
| 2021 (CIN) | 1.3 | 1 | 0 | 0 | 0 | 2 | 3 | 13.50 | 3.75 |
| 2022 (SEA) | 1.0 | 0 | 0 | 0 | 0 | 1 | 1 | 0.00 | 2.00 |
| 2024 (STL) | 8.0 | 0 | 0 | 0 | 0 | 11 | 8 | 11.25 | 2.63 |
| 2025 (STL) | 48.0 | 0 | 3 | 6 | 6 | 45 | 22 | 2.06 | 1.15 |
Riley O'Brien 2027 Statcast (pitching)
xERA
4.990
36
xwOBA against
.340
36
Whiff%
26.8%
65
K%
23.2%
63
Chase%
29.2%
46
Percentiles rank against this season's qualified MLB population; 100 is best.
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