How to read this player page

The big number is his career NUT, his total production against league average, with its letter grade. This season's NUT sits just below it, followed by his season and career lines, recent form over 7, 14 and 30 days, game logs, and percentile ranks against every qualified player. NUT is built on the advanced hitting and pitching stats analysts trust, with defense left out, so the number reflects what the player controls.

Jung Keun Bong 2026 Season · Louisville Bats

Jung Keun Bong played in the majors from 2002 to 2004. His career NUT is -0.3, #3,599 of 7,125 pitchers since 1876, and his best season by NUT was 2003 (-0.3). NUT is one number for production against league average: 0.0 is average, and every season is graded against its own league.

Career: 7-4, 5.17 ERA, 62 K in 78.1 IP.

NUT leaderboard · What is NUT?

Jung Keun Bong Career Stats & NUT | Baseball NUT

Jung Keun Bong

P · Louisville Bats (CIN)

Compare

DWeak

-0.3Career NUT

+0.3 to Average

Career

5.17ERA1.58WHIP7W62K78.1IP1SV

Career · season grades

L/L · 6' 3", 215 lb · b. Jul 15, 1980 · Seoul, South Korea · Signed International FA, 2002

Player Overview

Year by Year


2002	21	ATL	—	0	1	7.50	1	1	0	0	0	0	0	27	6.0	8	5	2	0	4	1.67
2003	22	ATL	-0.3	6	2	5.05	44	0	14	1	2	2	3	247	57.0	56	32	31	2	47	1.53
2004	23	CIN	—	1	1	4.70	3	3	0	0	0	0	0	75	15.1	17	8	10	0	11	1.76
Career	—	3 yrs	-0.3	7	4	5.17	48	4	14	1	2	2	3	349	78.1	81	45	43	2	62	1.58

Stat definitions →

NUT Breakdown

K Ability

HR Prevention

Walk Avoidance

What's driving Keun Bong's career NUT of -0.3

Slice size = share of total NUT. K Ability = Strikeouts · HR Prevention = HR allowed · Walk Avoidance = BB + HBP.

Career NUT Trend

NUT by Season

-0.3

Awards

2009WBC All-Tournament Team

Minor League

Year	Age	Lv	W	L	ERA	G	GS	GF	SV	BF	IP	H	ER	BB	HBP	SO	WHIP
1999	18	A	6	5	3.98	26	20	2	1	484	108.2	111	48	50	11	100	1.48
2000	19	A	7	7	4.23	20	19	0	0	500	112.2	119	53	45	14	90	1.46
2000	19	A+	3	1	2.18	7	6	0	0	163	41.1	33	10	7	5	37	0.97
2001	20	A+	13	9	3.00	28	28	0	0	677	168.0	151	56	47	4	145	1.18
2002	21	AA	7	8	3.25	27	17	4	2	533	122.0	136	44	45	3	107	1.48
2003	22	AAA	1	2	5.56	3	3	0	0	49	11.1	11	7	3	0	15	1.24
2004	23	AAA	8	8	5.82	19	19	0	0	413	94.1	118	61	31	2	65	1.58
2005	24	A+	0	0	4.50	1	1	0	0	17	4.0	4	2	1	0	1	1.25
2006	25	AA	1	1	5.09	4	2	1	0	82	17.2	20	10	8	0	17	1.58

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