Players · J · Pitcher · 2009 regular season
Jason Jennings
- Age
- 31
- B/T
- L/R
- Height
- 6' 2"
- Weight
- 235 lb
- Number
- #32
- Born
- July 17, 1978 in Dallas, TX, United States
- MLB debut
- August 23, 2001
- dbWAR
- 4.1 Regular season, 2005–2009 only
- IP
- 61.0
- ERA
- 4.13
- FIP
- 4.62
- K/9
- 6.5
- FIP−
- 107 100 = avg
Jason Jennings was a relief pitcher for the Texas Rangers. In 2009 he struck out 44 batters over 61.0 innings across 44 appearances, going 2-4. His ERA of 4.13 was 4.4% lower than the league average of 4.32 — 10th of 17 on his team, and 224th of 484 among MLB pitchers with 20+ innings. Stripping out defence, his 4.62 FIP suggests that his ERA had some help behind him. He missed bats on 21.7% of swings (9.3% of every pitch he threw), walked 10.3% of the batters he faced and struck out 16.2%. His 0.2 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, 2009 regular season.
WAR by season
Pitching Regular season
Standard and advanced, by season. Regular-season games only. Seasons on file run 2005–2009; his career began in 2001, and earlier seasons are not in this data yet.
Batting Regular season
Standard and advanced, by season. Regular-season games only. Seasons on file run 2005–2009; his career began in 2001, and earlier seasons are not in this data yet.
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 | 118 | 98 | 32 | 2 | 15 | 18 | .327 | .414 | .480 | .387 | 15.3% |
| vs RHB | 154 | 136 | 35 | 5 | 13 | 26 | .257 | .320 | .434 | .333 | 16.9% |
Spray chart
Where every ball he put in play landed, 2009.
Loading 1 batted balls…
Hot and cold zones
Batting average by pitch location, 2009.
Pitch sequencing
What Jason Jennings throws in each count, and what he follows each pitch with. Select any cell for the breakdown.
Select a count to see exactly what Jason Jennings throws in it.
Pitch arsenal
What he throws, how hard, how often it misses, and what hitters do with it.
| Slider | 439 | 81.4 | 892 | 43.5% | 32.5% | 98 | .286 | .808 | |
| Four-Seam Fastball | 308 | 88.2 | 1,583 | 42.5% | 10.9% | 62 | .306 | .913 | |
| Cutter | 178 | 88.9 | 1,454 | 47.8% | 17.3% | 38 | .211 | .656 | |
| Sinker | 94 | 88.4 | 1,802 | 18.1% | 11.1% | 26 | .269 | .614 | |
| Changeup | 32 | 81.9 | 1,878 | 34.4% | 21.4% | 6 | — | — | |
| Unknown | 25 | — | — | 36.0% | 27.3% | 7 | — | — |
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Similar players
Nearest 2009 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.