Stay up to date this MLB Season with the daily Baseball Reference Newsletter.

Junior Guerrero

Position: Pitcher

Bats: Right • Throws: Right

6-2, 175lb (188cm, 79kg)

Born: August 21, 1977 in Santo Domingo, Dominican Republic do

Full Name: Junior Ernesto Guerrero

View Player Info from the B-R Bullpen

Become a Stathead & surf this site ad-free.

Player News

Add Your Blog Posts Here

Hide Minors

Hide Other

Register Pitching

Register Pitching
Year	Age	AgeDif	Tm	Lg	Lev	Aff	W	L	W-L%	ERA	RA9	G	GS	GF	CG	SHO	SV	IP	H	R	ER	HR	BB	IBB	SO	HBP	BK	WP	BF	WHIP	H9	HR9	BB9	SO9	SO/W
1998	20	0.6	Royals	GULF	Rk	KCR	4	4	.500	3.23	3.52	13	6	3	0	0	0	61.1	57	24	22	2	19	0	58	2	1	5	257	1.239	8.4	0.3	2.8	8.5	3.05
1999	21		2 Teams	2 Lgs	A-A+	KCR	11	5	.688	2.31	2.83	28	28	0	0	0	0	155.2	120	49	40	8	71	0	181	3	2	14	647	1.227	6.9	0.5	4.1	10.5	2.55
1999	21	-1.5	Wilmington	CARL	A+	KCR	4	2	.667	1.40	1.75	9	9	0	0	0	0	51.1	30	10	8	2	26	0	68	0	0	4	206	1.091	5.3	0.4	4.6	11.9	2.62
1999	21	-0.4	Charleston WV	SALL	A	KCR	7	3	.700	2.76	3.36	19	19	0	0	0	0	104.1	90	39	32	6	45	0	113	3	2	10	441	1.294	7.8	0.5	3.9	9.7	2.51
2000	22	-2.0	Wichita	TL	AA	KCR	4	10	.286	5.70	6.39	28	24	2	0	0	0	131.0	153	93	83	25	69	2	79	3	3	8	603	1.695	10.5	1.7	4.7	5.4	1.14
2001	23		2 Teams	2 Lgs	A+-AA	KCR	6	6	.500	4.44	4.80	29	14	7	0	0	1	99.1	108	53	49	8	38	1	70	12	1	5	437	1.470	9.8	0.7	3.4	6.3	1.84
2001	23	-1.1	Wichita	TL	AA	KCR	1	2	.333	8.62	10.34	15	0	7	0	0	1	15.2	30	18	15	1	14	1	11	0	0	1	92	2.809	17.2	0.6	8.0	6.3	0.79
2001	23	0.4	Wilmington	CARL	A+	KCR	5	4	.556	3.66	3.76	14	14	0	0	0	0	83.2	78	35	34	7	24	0	59	12	1	4	345	1.219	8.4	0.8	2.6	6.3	2.46
2002	24		2 Teams	2 Lgs	A+-AA	KCR	6	8	.429	4.29	5.57	47	1	28	0	0	4	84.0	91	52	40	4	20	2	54	2	0	5	360	1.321	9.8	0.4	2.1	5.8	2.70
2002	24	0.2	Wichita	TL	AA	KCR	0	0		3.38	4.82	11	0	3	0	0	0	18.2	17	10	7	0	3	0	9	2	0	1	77	1.071	8.2	0.0	1.4	4.3	3.00
2002	24	1.3	Wilmington	CARL	A+	KCR	6	8	.429	4.55	5.79	36	1	25	0	0	4	65.1	74	42	33	4	17	2	45	0	0	4	283	1.393	10.2	0.6	2.3	6.2	2.65

2005	27	0.9	Worcester	CAMA	Ind		6	3	.667	3.80	4.36	17	17	0	1	0	0	97.0	91	47	41	9	46	1	61	5	0	9	420	1.412	8.4	0.8	4.3	5.7	1.33
2006	28	1.7	Worcester	CAMA	Ind		9	4	.692	1.89	2.32	18	17	1	1	1	0	104.2	90	27	22	4	44	0	79	2	0	5	440	1.280	7.7	0.3	3.8	6.8	1.80
2007	29	2.7	Worcester	CAMA	Ind		7	5	.583	3.76	4.35	21	21	0	2	0	0	122.0	119	59	51	6	52	0	93	3	1	4	536	1.402	8.8	0.4	3.8	6.9	1.79
2008	30	4.1	Worcester	CAMA	Ind		7	5	.583	5.59	5.76	19	19	0	1	0	0	106.1	113	68	66	19	42	0	63	3	1	2	458	1.458	9.6	1.6	3.6	5.3	1.50
Year	Age	AgeDif	Tm	Lg	Lev	Aff	W	L	W-L%	ERA	RA9	G	GS	GF	CG	SHO	SV	IP	H	R	ER	HR	BB	IBB	SO	HBP	BK	WP	BF	WHIP	H9	HR9	BB9	SO9	SO/W
Minors (5 seasons)					Minors		31	33	.484	3.96	4.59	145	73	40	0	0	5	531.1	529	271	234	47	217	5	442	22	7	37	2304	1.404	9.0	0.8	3.7	7.5	2.04
Other (4 seasons)					Other		29	17	.630	3.77	4.21	75	74	1	5	1	0	430.0	413	201	180	38	184	1	296	13	2	20	1854	1.388	8.6	0.8	3.9	6.2	1.61
All Levels (9 Seasons)							60	50	.545	3.88	4.42	220	147	41	5	1	5	961.1	942	472	414	85	401	6	738	35	9	57	4158	1.397	8.8	0.8	3.8	6.9	1.84

AA (3 seasons)					Minors		5	12	.294	5.72	6.59	54	24	12	0	0	1	165.1	200	121	105	26	86	3	99	5	3	10	772	1.730	10.9	1.4	4.7	5.4	1.15
A+ (3 seasons)					Minors		15	14	.517	3.37	3.91	59	24	25	0	0	4	200.1	182	87	75	13	67	2	172	12	1	12	834	1.243	8.2	0.6	3.0	7.7	2.57
A (1 season)					Minors		7	3	.700	2.76	3.36	19	19	0	0	0	0	104.1	90	39	32	6	45	0	113	3	2	10	441	1.294	7.8	0.5	3.9	9.7	2.51
Rk (1 season)					Minors		4	4	.500	3.23	3.52	13	6	3	0	0	0	61.1	57	24	22	2	19	0	58	2	1	5	257	1.239	8.4	0.3	2.8	8.5	3.05