Isaac Mattson fantasy outlook 2027
Isaac Mattson ranks 680th overall in our 2027 fantasy baseball rankings, 277th among relief pitchers, and 921st in points leagues. The 2027 projection is 2 W, 4.13 ERA, 1.36 WHIP, 46 K in 49 IP. In 2026 he posted a 5.35 ERA and 36 strikeouts over 38.67 innings across 38 appearances. He plays next season at 31.
Overall (5x5)
#680
of 1184
Relief pitcher
#277
of 409
Points leagues
#921
101 proj. pts
Dynasty
#680
Keeper value
Round 57
12-team draft
Pitching: projection and recent seasons
| Season | G | GS | IP | W | SV | HLD | K | K% | BB% | ERA | WHIP |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2027 projection | 46 | 0 | 49.0 | 2 | 0 | 10 | 46 | 21.5% | 9.6% | 4.13 | 1.36 |
| 2026 | 38 | 0 | 38.2 | 0 | 0 | 8 | 36 | 20.5% | 10.2% | 5.35 | 1.60 |
| 2025 | 44 | 0 | 47.2 | 3 | 0 | 12 | 45 | 22.7% | 9.6% | 2.45 | 1.13 |
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2026 splits
What hitters did against him, by the hand they bat with and where he pitched.
| Split | PA | AVG | OBP | SLG | HR | K |
|---|---|---|---|---|---|---|
| vs left-handed hitters | 92 | .313 | .391 | .525 | 2 | 17 |
| vs right-handed hitters | 84 | .250 | .321 | .342 | 1 | 19 |
| Home | 110 | .278 | .364 | .392 | 0 | 22 |
| Away | 66 | .288 | .348 | .508 | 3 | 14 |
2026 Statcast and advanced numbers
xBA against
.292
xSLG against
.498
xwOBA against
.374
FIP
3.72
ERA
5.35
38.67 IP
WAR
0.3
Expected stats come from Statcast as MLB's Stats API publishes them: what the quality of contact was worth, before defense and luck.
Ranked around Isaac Mattson
- #677Lane ThomasOFATL
- #678Gary SánchezCMIL
- #679Juan MejiaRPCOL
- #681Jaden HillRPCOL
- #682Nathaniel Lowe1BCLE
- #683Trevor WilliamsRPTEX
Best fantasy teammates
Pittsburgh Pirates depth chart- #21Paul SkenesSPPIT
- #43Brandon Lowe2BPIT
- #67Braxton AshcraftSPPIT
- #97Bryan ReynoldsOFPIT
- #103Oneil CruzOFPIT
- #180Ryan O'Hearn1BPIT
Common questions
Where should I draft Isaac Mattson in 2027?
Isaac Mattson is 680th on our 2027 board for 5x5 roto leagues, about round 57 in a 12-team draft, and 921st in standard points leagues.
Is Isaac Mattson a keeper for 2027?
He is worth a round 57 pick in a 12-team league, so he is a value to keep at any cost later than that round.
What positions is Isaac Mattson eligible at?
By 2026 games (20 at a position, or 5 starts or 8 relief outings for pitchers) he qualifies at RP. Leagues set their own thresholds.
What team does Isaac Mattson play for?
Isaac Mattson is listed with the Pittsburgh Pirates, in the bullpen on the depth chart.
More: 2027 relief pitcher rankings, dynasty rankings and keeper values. He is the 680th pick on our board.
By the Parlae deskPlayer data updated Oct 14, 2026 at 7:53 AM ETHow this is builtReport a wrong number