Pitcher · 2026
Reiver Sanmartin
- Age
- 30
- B/T
- L/L
- Height
- 6' 1"
- Weight
- 188 lb
- Number
- #48
- Born
- April 15, 1996 in Cartagena, Colombia
- MLB debut
- September 27, 2021
- dbWAR
- -.3 2 season(s)
- IP
- 5.1
- ERA
- 11.81
- FIP
- 9.65
- K/9
- 8.4
- FIP−
- 231 100 = avg
Reiver Sanmartin is a relief pitcher for the San Francisco Giants. In 2026 he struck out 5 batters over 5.1 innings across 5 appearances, going 1-0. His ERA of 11.81 was 182.9% higher than the league average of 4.18. Stripping out defence, his 9.65 FIP suggests he pitched better than his ERA shows. He missed bats on 16.3% of swings (7.2% of every pitch he threw), walked 7.1% of the batters he faced and struck out 17.9%. His -0.3 dbWAR is built from that FIP rather than runs allowed, so it credits him for what he controls and not for the defence behind him.
League context
Percentile among qualified pitchers, 2026.
Platoon splits
How left- and right-handed hitters fare against him.
| Split | PA | AB | H | HR | BB | SO | AVG | OBP | SLG | wOBA | K% |
|---|---|---|---|---|---|---|---|---|---|---|---|
| vs LHB | 12 | 11 | 5 | 0 | 1 | 3 | .455 | .500 | .636 | .497 | 25.0% |
| vs RHB | 16 | 15 | 6 | 3 | 1 | 2 | .400 | .438 | 1.133 | .631 | 12.5% |
Pitch sequencing
What Reiver Sanmartin throws in each count, and what he follows each pitch with. Select any cell for the breakdown.
Select a count to see exactly what Reiver Sanmartin throws in it.
Pitch arsenal
What he throws, how hard, and how often it misses in 2026.
| Sinker | 39 | 91.7 | 2,255 | 53.8% | 21.1% | |
| Slider | 24 | 82.9 | 2,538 | 37.5% | 20.0% | |
| Changeup | 24 | 86.9 | 2,097 | 33.3% | 9.1% | |
| Four-Seam Fastball | 10 | 92.2 | 2,259 | 30.0% | 0.0% |
Pitching
Standard and advanced, by season.
| Trend | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 5 | 0 | 5.1 | 1 | 0 | 0 | 11 | 7 | 5 | 2 | 11.81 | 9.65 | 2.44 | 8.4 | 3.4 | 283 | 231 | -0.3 | |
| 2025 | 1 | 0 | 1.2 | 0 | 0 | 0 | 2 | 0 | 2 | 1 | 0.00 | 2.54 | 1.80 | 10.8 | 5.4 | 0 | 61 | 0.0 |
Head to head
Put Reiver Sanmartin beside up to three others.
wOBA uses linear weights measured from this season's own play-by-play rather than published constants, and wRC+ is park-adjusted against that same league. dbWAR is our own open implementation — not fWAR or bWAR — and the full derivation, including its simplifications, is on the methodology page.