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Christian Koss

Positions: Shortstop, Second Baseman and Third Baseman

Bats: Right • Throws: Right

6-1, 185lb (185cm, 83kg)

Born: January 27, 1998 in Riverside, CA us

Draft: Drafted by the Colorado Rockies in the 12th round of the 2019 MLB June Amateur Draft from University of California, Irvine (Irvine, CA).

School: University of California, Irvine (Irvine, CA)

Rookie Status: Exceeded rookie limits during 2025 season

2026 Contract Status: Pre-Arb Eligible

Service Time (01/2026): 1.000 • Arb Eligible: 2028 • Free Agent: 2031

Full Name: Christian Koss

Pronunciation: \like boss\

Instagram: @koss25

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SUMMARY

2026

Career

WAR

-0.3

1.7

193

.105

.249

RBI

OBP

.150

.293

SLG

.158

.347

OPS

.308

.640

OPS+

-12

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Year	Age	AgeDif	Tm	Lg	Lev	Aff	G	PA	AB	R	H	2B	3B	HR	RBI	SB	CS	BB	SO	BA	OBP	SLG	OPS	TB	GDP	HBP	SH	SF	IBB
2016	18	-1.5	Yakima Valley	WCL	Smr		45	206	180	28	55	9	2	1	22	12	1	13	34	.306	.362	.394	.756	71		4	7	2	0
2017	19	-1.8	UC Irvine	BigW	NCAA		40	147	122	14	22	3	1	0	20	0	1	12	24	.180	.259	.221	.480	27		2	8	3	0
2017	19	-1.0	Yarmouth-Dennis	CCBL	Smr		35	112	94	13	29	4	0	1	10	4	3	15	24	.309	.404	.383	.787	36		0	3	0	0
2018	20	-0.7	UC Irvine	BigW	NCAA		52	224	195	25	56	9	3	1	17	4	2	14	44	.287	.343	.379	.722	74		4	8	3	0
2018	20	0.0	Yarmouth-Dennis	CCBL	Smr		36	131	114	21	30	3	1	1	18	1	2	12	21	.263	.323	.333	.656	38		0	1	4	0
2019	21	0.2	UC Irvine	BigW	NCAA		54	243	202	45	62	12	5	5	30	11	2	25	51	.307	.397	.490	.888	99		8	4	4	0
2019	21	0.4	Grand Junction	PION	Rk	COL	53	238	190	45	63	11	4	11	51	10	4	35	43	.332	.447	.605	1.052	115	0	7	3	3	1

2021	23	0.1	Greenville	HAE	A+	BOS	104	468	428	65	116	18	7	15	55	10	4	31	100	.271	.325	.451	.776	193	4	5	0	4	0
2021	23	0.3	Scottsdale	AZFL	Fal		14	51	48	4	11	1	0	0	6	2	0	3	8	.229	.275	.250	.525	12	0	0	0	0	0
2022	24	0.1	Portland	EL	AA	BOS	125	531	488	69	127	22	5	17	84	16	5	25	137	.260	.309	.430	.739	210	7	12	0	6	2
2022-23	24	-2.2	Caguas	PRWL	FgW		29	97	87	7	20	3	1	0	9	3	5	7	17	.230	.299	.287	.586	25	1	2	0	1	0
2023	25		3 Teams	3 Lgs	AA-AAA-Rk	BOS	79	296	272	35	64	16	2	4	23	15	3	16	65	.235	.287	.353	.640	96	5	4	3	1	0
2023	25	-1.3	Worcester	IL	AAA	BOS	34	124	114	13	27	8	1	1	10	2	1	5	26	.237	.285	.351	.635	40	3	3	1	1	0
2023	25	1.2	Portland	EL	AA	BOS	38	147	134	18	30	7	1	2	10	11	1	10	33	.224	.283	.336	.619	45	2	1	2	0	0
2023	25	5.4	Red Sox	FCL	Rk	BOS	7	25	24	4	7	1	0	1	3	2	1	1	6	.292	.320	.458	.778	11	0	0	0	0	0
2023-24	25	-1.2	Caguas	PRWL	FgW		5	13	11	1	3	1	0	0	3	1	0	0	2	.273	.333	.364	.697	4	1	1	1	0	0
2024	26		3 Teams	3 Lgs	AAA-AA-Rk	SFG	88	324	278	53	83	24	2	9	47	13	1	30	59	.299	.376	.496	.873	138	6	7	5	4	0
2024	26	-0.7	Sacramento	PCL	AAA	SFG	54	197	171	32	44	10	1	5	19	5	0	14	45	.257	.332	.415	.747	71	5	6	4	2	0
2024	26	2.3	Richmond	EL	AA	SFG	25	96	83	16	32	12	1	2	21	6	1	10	12	.386	.453	.627	1.079	52	1	1	1	1	0
2024	26	6.1	Giants	ACL	Rk	SFG	9	31	24	5	7	2	0	2	7	2	0	6	2	.292	.419	.625	1.044	15	0	0	0	1	0
2024-25	26	-2.9	Aguilas	DOWL	FgW		14	41	34	3	6	1	0	0	0	2	0	4	12	.176	.300	.206	.506	7	0	2	1	0	0
2025	27		2 Teams	2 Lgs	AAA-Rk	SFG	7	30	30	5	10	2	0	1	6	0	1	0	6	.333	.333	.500	.833	15	0	0	0	0	0
2025	27	0.2	Sacramento	PCL	AAA	SFG	6	27	27	3	8	2	0	1	5	0	1	0	6	.296	.296	.481	.778	13	0	0	0	0	0
2025	27	7.2	Giants	ACL	Rk	SFG	1	3	3	2	2	0	0	0	1	0	0	0	0	.667	.667	.667	1.333	2	0	0	0	0	0
2025	27	-1.1	SFG	NL	Maj	SFG	76	191	174	25	46	9	0	3	23	4	1	9	45	.264	.309	.368	.676	64	4	3	3	2	0
2026	28		2 Teams	2 Lgs	Rk-AAA	SFG	8	29	27	9	11	0	0	2	10	2	0	1	3	.407	.448	.630	1.078	17	0	1	0	0	0
2026	28	1.0	Sacramento	PCL	AAA	SFG	3	10	9	4	4	0	0	1	3	1	0	0	1	.444	.500	.778	1.278	7	0	1	0	0	0
2026	28	8.4	Giants	ACL	Rk	SFG	5	19	18	5	7	0	0	1	7	1	0	1	2	.389	.421	.556	.977	10	0	0	0	0	0
2026	28	0.0	SFG	NL	Maj	SFG	12	20	19	1	2	1	0	0	0	0	0	0	2	.105	.150	.158	.308	3	0	1	0	0	0
Year	Age	AgeDif	Tm	Lg	Lev	Aff	G	PA	AB	R	H	2B	3B	HR	RBI	SB	CS	BB	SO	BA	OBP	SLG	OPS	TB	GDP	HBP	SH	SF	IBB
Majors (2 seasons)					Majors		88	211	193	26	48	10	0	3	23	4	1	9	47	.249	.293	.347	.640	67	4	4	3	2	0
Minors (7 seasons)					Minors		464	1916	1713	281	474	93	20	59	276	66	18	138	413	.277	.340	.458	.798	784	22	36	11	18	3
Foreign (3 seasons)					Foreign		48	151	132	11	29	5	1	0	12	6	5	11	31	.220	.302	.273	.575	36	2	5	2	1	0
College (3 seasons)					College		146	614	519	84	140	24	9	6	67	15	5	51	119	.270	.345	.385	.730	200		14	20	10	0
Other (4 seasons)					Other		130	500	436	66	125	17	3	3	56	19	6	43	87	.287	.352	.360	.712	157		4	11	6	0
All Levels (10 Seasons)							876	3392	2993	468	816	149	33	71	434	110	35	252	697	.273	.338	.416	.754	1244	28	63	47	37	3

AAA (4 seasons)					Minors		97	358	321	52	83	20	2	8	37	8	2	19	78	.259	.317	.408	.725	131	8	10	5	3	0
AA (3 seasons)					Minors		188	774	705	103	189	41	7	21	115	33	7	45	182	.268	.322	.435	.757	307	10	14	3	7	2
A+ (1 season)					Minors		104	468	428	65	116	18	7	15	55	10	4	31	100	.271	.325	.451	.776	193	4	5	0	4	0
Rk (5 seasons)					Minors		75	316	259	61	86	14	4	15	69	15	5	43	53	.332	.435	.591	1.025	153	0	7	3	4	1
Fal (1 season)					Other		14	51	48	4	11	1	0	0	6	2	0	3	8	.229	.275	.250	.525	12	0	0	0	0	0
Smr (3 seasons)					Other		116	449	388	62	114	16	3	3	50	17	6	40	79	.294	.361	.374	.734	145		4	11	6	0