Jon Kemmer

PosLF

B/TL/L

Born1990-11-17

Age (2027)36

No MLB projection yet. Career stats below are historical.

Overview

INTLLAST SEASON 2020

Year	Age	Lvl / Team	PA	AVG/OBP/SLG	HR	SB	wRC+	WAR	MLE AVG/OBP/SLG
2018	27	AAAWSH	463	.244/.328/.451	17	5	71	—	.195/.258/.362
2019	28	AAA/INTL2 orgs	479	.297/.395/.552	27	2	93	—	.223/.312/.418
2020	29	INTLAguilas Cibae…	15	.250/.400/.333	0	0	122	—

Contract

No contract data on file.

Career Stats + Projections

Real MLB stats plus park-adjusted projections — this season (so far / rest / full), then future seasons and career totals.

show model inputsbasis chips: RAW = as recorded · CTX = with park/league context · A+C = actual + context combined · MLE = level/park-neutral

Methodology▸ how these numbers are built

All seasons translated to park-neutral MLB-equivalent (MLE) and combined per year. 2027 = full-season projection (no games played yet). 2028+ via Advanced Marcel + aging curve.

Year	Age	Lvl	Team	MLB%	PA	AB	H	2B	3B	HR	BB	SO	HBP	SB	CS	AVG	OBP	SLG	OPS	ISO	BABIP	K%	BB%	wOBA	wRC+	BAT	RUN	FLD	POS	REP	WAR
▸ Career — actual stats, one row per stint (as recorded, no adjustments)
2014	23	A+	Lancaster JetHawks	—	159	153	45	10	1	12	4	33	1	0	1	294	316	608	924	314	303	21	3	395	84	—	—	—	—	—	—
2014	23	A	Quad Cities River Bandits	—	204	180	52	15	1	4	20	39	3	3	1	289	369	450	819	161	350	19	10	364	74	—	—	—	—	—	—
2015	24	AA	Corpus Christi Hooks	—	425	364	119	28	4	18	45	89	12	9	1	327	418	574	992	247	387	21	11	429	120	—	—	—	—	—	—
2016	25	AAA	Fresno Grizzlies	—	452	407	108	24	4	18	38	128	5	8	10	265	336	477	812	211	342	28	8	356	64	—	—	—	—	—	—
2017	26	AAA	Fresno Grizzlies	—	358	304	91	17	3	16	44	95	8	6	2	299	402	533	935	234	385	27	12	409	101	—	—	—	—	—	—
2018	27	AAA	Rochester Red Wings	—	463	410	100	24	5	17	42	125	9	5	2	244	328	451	779	207	307	27	9	344	71	—	—	—	—	—	—
2019	28	AAA	Oklahoma City Dodgers	—	401	339	108	21	0	27	45	102	16	1	1	319	422	619	1.042	301	384	25	11	450	103	—	—	—	—	—	—
2019	28	INTL	Algodoneros de Guasave	—	78	72	14	3	0	0	5	29	1	1	0	194	256	236	493	42	326	37	6	231	43	—	—	—	—	—	—
2020	29	INTL	Aguilas Cibaenas	—	15	12	3	1	0	0	2	3	1	0	0	250	400	333	733	83	333	20	13	348	122	—	—	—	—	—	—
▸ Career — adjusted (every ACTUAL line translated to park/league-neutral MLB equivalents)
2014	23	A+ MLE	Lancaster JetHawks	—	159	154	36	8	1	8	3	47	1	0	1	234	253	455	708	221	271	30	2	293	84	—	—	—	—	—	—
2014	23	A MLE	Quad Cities River Bandits	—	204	187	44	12	1	3	13	53	3	3	1	235	296	358	654	123	302	26	6	278	74	—	—	—	—	—	—
2015	24	AA MLE	Corpus Christi Hooks	—	425	379	102	24	4	13	30	113	12	9	1	269	342	456	799	187	339	27	7	346	120	—	—	—	—	—	—
2016	25	AAA MLE	Fresno Grizzlies	—	452	418	85	17	3	13	27	166	5	8	10	203	260	352	612	148	294	37	6	263	64	—	—	—	—	—	—
2017	26	AAA MLE	Fresno Grizzlies	—	358	318	75	14	2	12	30	124	8	6	2	236	317	406	723	170	341	35	8	318	101	—	—	—	—	—	—
2018	27	AAA MLE	Rochester Red Wings	—	463	425	83	18	4	15	27	153	9	5	2	195	258	362	620	167	261	33	6	273	71	—	—	—	—	—	—
2019	28	AAA MLE	Oklahoma City Dodgers	—	401	354	79	15	0	18	30	130	16	1	1	223	312	418	731	195	291	32	7	321	103	—	—	—	—	—	—
2014	23	A MLE	2 teams	—	363	341	80	20	2	11	16	100	4	3	2	235	277	402	679	167	299	28	4	285	79	—	—	—	—	—	—
2014	23	A RAW	2 teams	—	363	333	97	25	2	16	24	72	4	3	2	291	346	523	869	231	329	20	7	378	79	—	—	—	—	—	—
2015	24	AA MLE	Corpus Christi Hooks	—	425	379	102	24	4	13	30	113	12	9	1	269	342	456	799	187	346	27	7	346	120	—	—	—	—	—	—
2015	24	AA RAW	Corpus Christi Hooks	—	425	364	119	28	4	18	45	89	12	9	1	327	418	574	992	247	387	21	11	429	120	—	—	—	—	—	—
2016	25	AAA MLE	Fresno Grizzlies	—	452	418	85	17	3	13	27	166	5	8	10	203	260	352	612	148	299	37	6	263	64	—	—	—	—	—	—
2016	25	AAA RAW	Fresno Grizzlies	—	452	407	108	24	4	18	38	128	5	8	10	265	336	477	812	211	342	28	8	356	64	—	—	—	—	—	—
2017	26	AAA MLE	Fresno Grizzlies	—	358	318	75	14	2	12	30	124	8	6	2	236	317	406	723	170	342	35	8	318	101	—	—	—	—	—	—
2017	26	AAA RAW	Fresno Grizzlies	—	358	304	91	17	3	16	44	95	8	6	2	299	402	533	935	234	385	27	12	409	101	—	—	—	—	—	—
2018	27	AAA MLE	Rochester Red Wings	—	463	425	83	18	4	15	27	153	9	5	2	195	258	362	620	167	263	33	6	273	71	—	—	—	—	—	—
2018	27	AAA RAW	Rochester Red Wings	—	463	410	100	24	5	17	42	125	9	5	2	244	328	451	779	207	307	27	9	344	71	—	—	—	—	—	—
2019	28	AAA MLE	2 teams	—	479	425	95	18	0	22	36	155	17	2	1	224	310	421	731	198	293	32	8	321	103	—	—	—	—	—	—
2019	28	AAA RAW	2 teams	—	479	411	122	24	0	27	50	131	17	2	1	297	395	552	948	255	374	27	10	415	103	—	—	—	—	—	—
2020	29	INTL MLE	Aguilas Cibaenas	—	15	12	3	1	0	0	2	3	1	0	0	250	400	333	733	83	333	20	13	—	—	—	—	—	—	—	—
2020	29	INTL RAW	Aguilas Cibaenas	—	15	12	3	1	0	0	2	3	1	0	0	250	400	333	733	83	333	20	13	348	122	—	—	—	—	—	—
2014	23	A MLE	2 teams	—	363	340	80	20	2	11	16	100	4	3	2	235	277	403	680	168	288	28	4	285	79	—	—	—	—	—	—
2015	24	AA MLE	Corpus Christi Hooks	—	425	380	102	24	4	13	30	113	12	9	1	268	342	455	797	187	339	27	7	346	120	—	—	—	—	—	—
2016	25	AAA MLE	Fresno Grizzlies	—	452	417	85	17	3	13	27	166	5	8	10	204	260	353	613	149	294	37	6	263	64	—	—	—	—	—	—
2017	26	AAA MLE	Fresno Grizzlies	—	358	317	75	14	2	12	30	124	8	6	2	237	317	407	724	170	341	35	8	318	101	—	—	—	—	—	—
2018	27	AAA MLE	Rochester Red Wings	—	463	424	83	18	4	15	27	153	9	5	2	196	258	363	621	167	261	33	6	273	71	—	—	—	—	—	—
2019	28	AAA MLE	2 teams	—	479	423	95	18	0	22	36	155	17	2	1	225	310	423	733	199	291	32	8	321	103	—	—	—	—	—	—
▸ Career Totals
Career	—	MLE		—	2555	2318	523	112	15	86	168	814	56	33	18	226	294	398	692	173	306	32	7	299	88	-36	-1	+0	-27	+55	-0.8
/ 162G	—	MLE		—	650	590	133	28	4	22	43	207	14	8	5	225	294	398	692	173	305	32	7	299	88	-9	-0	+0	-7	+14	-0.2

How the minor-league lines were translated

One row per minor-league stint. Open a row to see each step: the raw rate, the park adjustment, the league/level factor, the age adjustment (hitters) and the resulting MLE rate. Factors are the same ones listed on the MLE Factors page.

2019 AAAOklahoma City Dodgers · 401 PAwOBA .438 → .321 (−117)K% 25.4% → 32.4%

Component	Raw	Park ÷	Level factor ×	GB/FB ×	Age ×	= MLE
K% /PA	25.44%	÷1.014	×1.290	—	—	32.36%
BB% (unintentional) /PA	10.72%	÷0.993	×0.710	—	×0.982	7.53%
HBP% /PA	3.99%	—	×0.980	—	×0.982	3.84%
Singles /BIP	25.32%	÷1.048	×0.900	×0.950	×0.982	20.29%
Doubles /BIP	8.86%	÷1.012	×0.810	×0.950	×0.982	6.62%
Triples /BIP	0.00%	÷1.045	×0.810	×0.950	×0.982	0.00%
Home runs /BIP	11.39%	÷1.073	×0.780	—	×0.982	8.13%

Factors used: league row PCL. Park (home-season share, regressed): HR 115, 1B 110, 2B 102, 3B 109, K 103, BB 99 — applied at half strength. Age: age 29 vs a level average of 27.2 → −1.8% on BB/HBP/hit rates (1.8 yr older than average). Ground-ball/fly-ball mix moves 1B/2B/3B by ×0.950.

Result: wOBA .438 → .321; ISO .301 → .206; BABIP .384 → .291. Both wOBAs use the same linear weights, so the change is the translation alone. The MLE line is not regressed to the mean — regression happens later, when seasons are blended into a projection (how).

2018 AAARochester Red Wings · 463 PAwOBA .334 → .273 (−62)K% 27.0% → 33.1%

Component	Raw	Park ÷	Level factor ×	GB/FB ×	Age ×	= MLE
K% /PA	27.00%	÷0.978	×1.200	—	—	33.14%
BB% (unintentional) /PA	8.64%	÷1.008	×0.690	—	×0.992	5.86%
HBP% /PA	1.94%	—	×0.940	—	×0.992	1.81%
Singles /BIP	18.95%	÷1.023	×0.930	×0.977	×0.992	16.69%
Doubles /BIP	8.42%	÷1.009	×0.830	×0.977	×0.992	6.71%
Triples /BIP	1.75%	÷1.150	×0.970	×0.977	×0.992	1.43%
Home runs /BIP	5.96%	÷0.879	×0.840	—	×0.992	5.65%

Factors used: league row IL. Park (home-season share, regressed): HR 76, 1B 105, 2B 102, 3B 130, K 96, BB 102 — applied at half strength. Age: age 28 vs a level average of 27.2 → −0.8% on BB/HBP/hit rates (0.8 yr older than average). Ground-ball/fly-ball mix moves 1B/2B/3B by ×0.977.

Result: wOBA .334 → .273; ISO .207 → .177; BABIP .307 → .261. Both wOBAs use the same linear weights, so the change is the translation alone. The MLE line is not regressed to the mean — regression happens later, when seasons are blended into a projection (how).

2017 AAAFresno Grizzlies · 358 PAwOBA .400 → .318 (−82)K% 26.5% → 34.5%

Component	Raw	Park ÷	Level factor ×	GB/FB ×	Age ×	= MLE
K% /PA	26.54%	÷0.992	×1.290	—	—	34.50%
BB% (unintentional) /PA	12.29%	÷1.028	×0.710	—	×1.003	8.52%
HBP% /PA	2.23%	—	×0.980	—	×1.003	2.20%
Singles /BIP	26.32%	÷0.978	×0.900	×0.995	×1.003	24.18%
Doubles /BIP	8.13%	÷0.926	×0.810	×0.995	×1.003	7.10%
Triples /BIP	1.44%	÷1.150	×0.810	×0.995	×1.003	1.01%
Home runs /BIP	7.66%	÷0.963	×0.780	—	×1.003	6.22%

Factors used: league row PCL. Park (home-season share, regressed): HR 93, 1B 96, 2B 85, 3B 130, K 98, BB 106 — applied at half strength. Age: age 27 vs a level average of 27.2 → +0.3% on BB/HBP/hit rates (0.2 yr younger than average). Ground-ball/fly-ball mix moves 1B/2B/3B by ×0.995.

Result: wOBA .400 → .318; ISO .234 → .179; BABIP .385 → .341. Both wOBAs use the same linear weights, so the change is the translation alone. The MLE line is not regressed to the mean — regression happens later, when seasons are blended into a projection (how).

2016 AAAFresno Grizzlies · 452 PAwOBA .348 → .263 (−85)K% 28.3% → 36.7%

Component	Raw	Park ÷	Level factor ×	GB/FB ×	Age ×	= MLE
K% /PA	28.32%	÷0.996	×1.290	—	—	36.66%
BB% (unintentional) /PA	8.41%	÷1.008	×0.710	—	×1.018	6.03%
HBP% /PA	1.11%	—	×0.980	—	×1.018	1.10%
Singles /BIP	22.22%	÷1.000	×0.900	×1.003	×1.018	20.42%
Doubles /BIP	8.60%	÷1.061	×0.810	×1.003	×1.018	6.70%
Triples /BIP	1.43%	÷1.150	×0.810	×1.003	×1.018	1.03%
Home runs /BIP	6.45%	÷1.040	×0.780	—	×1.018	4.93%

Factors used: league row PCL. Park (home-season share, regressed): HR 108, 1B 100, 2B 112, 3B 130, K 99, BB 102 — applied at half strength. Age: age 26 vs a level average of 27.2 → +1.8% on BB/HBP/hit rates (1.2 yr younger than average). Ground-ball/fly-ball mix moves 1B/2B/3B by ×1.003.

Result: wOBA .348 → .263; ISO .211 → .147; BABIP .342 → .294. Both wOBAs use the same linear weights, so the change is the translation alone. The MLE line is not regressed to the mean — regression happens later, when seasons are blended into a projection (how).

2015 AACorpus Christi Hooks · 425 PAwOBA .421 → .346 (−75)K% 20.9% → 26.5%

Component	Raw	Park ÷	Level factor ×	GB/FB ×	Age ×	= MLE
K% /PA	20.94%	÷0.964	×1.220	—	—	26.51%
BB% (unintentional) /PA	10.12%	÷1.003	×0.700	—	×0.998	7.04%
HBP% /PA	2.82%	—	×0.870	—	×0.998	2.45%
Singles /BIP	25.09%	÷1.022	×0.920	×0.994	×0.998	22.39%
Doubles /BIP	10.18%	÷0.963	×0.840	×0.994	×0.998	8.81%
Triples /BIP	1.45%	÷0.900	×0.940	×0.994	×0.998	1.51%
Home runs /BIP	6.55%	÷1.059	×0.800	—	×0.998	4.94%

Factors used: league row TL. Park (home-season share, regressed): HR 112, 1B 104, 2B 93, 3B 80, K 93, BB 101 — applied at half strength. Age: age 25 vs a level average of 24.8 → −0.2% on BB/HBP/hit rates (0.2 yr older than average). Ground-ball/fly-ball mix moves 1B/2B/3B by ×0.994.

Result: wOBA .421 → .346; ISO .247 → .199; BABIP .387 → .339. Both wOBAs use the same linear weights, so the change is the translation alone. The MLE line is not regressed to the mean — regression happens later, when seasons are blended into a projection (how).

2014 AQuad Cities River Bandits · 204 PAwOBA .353 → .278 (−75)K% 19.1% → 25.9%

Component	Raw	Park ÷	Level factor ×	GB/FB ×	Age ×	= MLE
K% /PA	19.12%	÷1.004	×1.360	—	—	25.91%
BB% (unintentional) /PA	9.31%	÷1.005	×0.690	—	×0.980	6.26%
HBP% /PA	1.47%	—	×0.780	—	×0.980	1.12%
Singles /BIP	22.70%	÷1.003	×0.920	×0.997	×0.980	20.35%
Doubles /BIP	10.64%	÷0.999	×0.830	×0.997	×0.980	8.64%
Triples /BIP	0.71%	÷1.013	×0.910	×0.997	×0.980	0.62%
Home runs /BIP	2.84%	÷1.084	×0.800	—	×0.980	2.05%

Factors used: level-wide A factors (no league-specific row for this league/era). Park (home-season share, regressed): HR 117, 1B 101, 2B 100, 3B 103, K 101, BB 101 — applied at half strength. Age: age 24 vs a level average of 22.0 → −2.0% on BB/HBP/hit rates (2.0 yr older than average). Ground-ball/fly-ball mix moves 1B/2B/3B by ×0.997.

Result: wOBA .353 → .278; ISO .161 → .121; BABIP .350 → .302. Both wOBAs use the same linear weights, so the change is the translation alone. The MLE line is not regressed to the mean — regression happens later, when seasons are blended into a projection (how).

2014 A+Lancaster JetHawks · 159 PAwOBA .385 → .293 (−92)K% 20.8% → 29.4%

Component	Raw	Park ÷	Level factor ×	GB/FB ×	Age ×	= MLE
K% /PA	20.75%	÷0.948	×1.340	—	—	29.35%
BB% (unintentional) /PA	2.52%	÷0.987	×0.710	—	×0.988	1.79%
HBP% /PA	0.63%	—	×0.790	—	×0.988	0.49%
Singles /BIP	18.33%	÷0.999	×0.910	×1.050	×0.988	17.32%
Doubles /BIP	8.33%	÷0.963	×0.820	×1.050	×0.988	7.36%
Triples /BIP	0.83%	÷0.915	×0.760	×1.050	×0.988	0.72%
Home runs /BIP	10.00%	÷1.234	×0.920	—	×0.988	7.37%

Factors used: league row CAL. Park (home-season share, regressed): HR 147, 1B 100, 2B 93, 3B 83, K 90, BB 97 — applied at half strength. Age: age 24 vs a level average of 22.8 → −1.2% on BB/HBP/hit rates (1.2 yr older than average). Ground-ball/fly-ball mix moves 1B/2B/3B by ×1.050.

Result: wOBA .385 → .293; ISO .314 → .220; BABIP .303 → .271. Both wOBAs use the same linear weights, so the change is the translation alone. The MLE line is not regressed to the mean — regression happens later, when seasons are blended into a projection (how).

Not traceable per stint: some stints lack the counting stats the component translation needs. Level-wide factors that apply instead — .