Players · K · Pitcher · 2012 regular season
Jeff Karstens
- Age
- 30
- B/T
- R/R
- Height
- 6' 3"
- Weight
- 185 lb
- Number
- #27
- Born
- September 24, 1982 in San Diego, CA, United States
- MLB debut
- August 22, 2006
- dbWAR
- 2.4 Regular season, 12 season(s)
- IP
- 90.2
- ERA
- 3.97
- FIP
- 3.31
- K/9
- 6.6
- FIP−
- 83 100 = avg
Jeff Karstens was a starting pitcher for the Pittsburgh Pirates. In 2012 he struck out 66 batters over 90.2 innings across 19 appearances, 15 of them starts, going 5-4. His ERA of 3.97 was 1.1% lower than the league average of 4.01 — 10th of 15 on his team, and 268th of 484 among MLB pitchers with 20+ innings. Stripping out defence, his 3.31 FIP suggests he pitched better than his ERA shows. He missed bats on 22.7% of swings (11.1% of every pitch he threw), walked 4.0% of the batters he faced and struck out 17.7%. His 1.5 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, 2012 regular season.
WAR by season
Pitching Regular season
Standard and advanced, by season. Regular-season games only.
| Trend | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2012 | PIT | 19 | 15 | 90.2 | 5 | 4 | 0 | 89 | 40 | 66 | 15 | 3.97 | 3.31 | 1.15 | 6.6 | 1.5 | 99 | 83 | 1.5 | |
| 2011 | PIT | 30 | 26 | 162.1 | 9 | 9 | 0 | 163 | 61 | 96 | 33 | 3.38 | 4.29 | 1.21 | 5.3 | 1.8 | 86 | 109 | 1.0 | |
| 2010 | PIT | 26 | 19 | 122.2 | 3 | 10 | 0 | 146 | 67 | 72 | 27 | 4.92 | 4.82 | 1.41 | 5.3 | 2.0 | 121 | 118 | 0.2 | |
| 2009 | PIT | 39 | 13 | 108.0 | 4 | 6 | 0 | 115 | 65 | 52 | 45 | 5.42 | 4.88 | 1.48 | 4.3 | 3.8 | 125 | 113 | 0.2 | |
| 2008 | PIT | 9 | 9 | 51.1 | 2 | 6 | 0 | 56 | 23 | 23 | 13 | 4.03 | 4.77 | 1.34 | 4.0 | 2.3 | 93 | 110 | 0.3 | |
| 2007 | NYY | 7 | 3 | 14.2 | 1 | 4 | 0 | 27 | 18 | 5 | 9 | 11.05 | 7.94 | 2.45 | 3.1 | 5.5 | 247 | 178 | -0.4 | |
| 2006 | NYY | 8 | 6 | 42.2 | 2 | 1 | 0 | 40 | 18 | 16 | 11 | 3.80 | 5.07 | 1.20 | 3.4 | 2.3 | 84 | 112 | 0.2 |
Batting Regular season
Standard and advanced, by season. Regular-season games only.
| Trend | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2012 | PIT | 14 | 29 | 3 | 0 | 2 | 0 | 0 | 15 | .107 | .107 | .107 | .000 | .231 | 0.0% | 51.7% | .095 | -5.1 | -58 | -0.1 | |
| 2011 | PIT | 25 | 58 | 5 | 0 | 2 | 0 | 3 | 28 | .104 | .157 | .125 | .021 | .250 | 5.2% | 48.3% | .137 | -8.2 | -26 | -0.1 | |
| 2010 | PIT | 19 | 38 | 2 | 0 | 0 | 0 | 1 | 16 | .061 | .088 | .061 | .000 | .118 | 2.6% | 42.1% | .074 | -7.6 | -73 | -0.3 | |
| 2009 | PIT | 17 | 26 | 1 | 0 | 0 | 0 | 2 | 12 | .045 | .160 | .045 | .000 | .100 | 7.7% | 46.2% | .123 | -4.4 | -42 | -0.1 | |
| 2008 | PIT | 9 | 18 | 2 | 0 | 0 | 0 | 2 | 8 | .143 | .250 | .143 | .000 | .333 | 11.1% | 44.4% | .203 | -1.9 | 12 | 0.1 |
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 | 159 | 148 | 36 | 4 | 6 | 27 | .243 | .277 | .378 | .290 | 17.0% |
| vs RHB | 213 | 200 | 53 | 4 | 9 | 39 | .265 | .295 | .380 | .298 | 18.3% |
Spray chart
Where every ball he put in play landed, 2012.
Loading 14 batted balls…
Hot and cold zones
Batting average by pitch location, 2012.
Pitch sequencing
What Jeff Karstens throws in each count, and what he follows each pitch with. Select any cell for the breakdown.
Select a count to see exactly what Jeff Karstens throws in it.
Pitch arsenal
What he throws, how hard, how often it misses, and what hitters do with it.
| Sinker | 502 | 89.3 | 2,166 | 47.4% | 13.5% | 112 | .277 | .679 | |
| Curveball | 262 | 70.6 | 1,615 | 47.3% | 37.1% | 88 | .216 | .574 | |
| Four-Seam Fastball | 189 | 89.4 | 1,951 | 46.0% | 15.1% | 42 | .286 | .667 | |
| Changeup | 181 | 81.1 | 1,386 | 39.8% | 24.5% | 54 | .259 | .625 | |
| Slider | 171 | 79.3 | 836 | 42.7% | 27.1% | 50 | .260 | .868 |
Compare Jeff Karstens with…
Side by side with up to three others.
Similar players
Nearest 2012 seasons by command, run prevention and role, on rate statistics rather than totals.
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.