MLB / Players

Dave Koslo

HandednessBats Left · Throws Left

Listed at5 ft 11 in · 180 lb

BornMarch 31, 1920 · Menasha, WI, USA

MLB debutSeptember 12, 1941

Final gameApril 14, 1955

Seasons12 (1941–1955)

New York Giants 1941–1942; New York Giants 1946–1953; Baltimore Orioles 1954; Milwaukee Braves 1954–1955

Percentile snapshot

1952 season — qualified pitchers

1.7

21.7

96.7

SHO

38.3

154

86.7

91.7

11.7

81.7

166.3

16.7

ERA

3.19

WHIP

1.208

73.3

K/9

3.63

21.7

FIP

3.28

63.3

FIP-

87.7

66.7

ERA+

117.0

sWAR

2.3

46.7

of 61 qualified 1952 pitchers (min 154 IP)

Career, era-adjusted

ERA+

105.6

59.5

sWAR

17.7

92.5

ERA+ measured against qualified careers (1,000+ IP), 1,334 of them; sWAR measured against every career in history, 24,011 of them. Only era-adjusted career stats carry a percentile — a raw career total gets a rank instead, because pooling the 1890s with the 2020s is a choice, not a measurement.

Season by season

Batting

Season	G	PA	AB	R	H	2B	HR	RBI	BB	SO	SB	CS	BA	OBP	SLG	OPS	wRC+	OPS+	wOBA	sWAR
1941	4	9	9	0	1	0	0	0	0	7	0	0	.111	.111	.111	.222	-59.0	-37.9	.104	0.7
1942	19	27	25	4	3	2	0	1	2	10	0	0	.120	.185	.200	.385	2.2	12.8	.191	-1.0
1946	41	93	88	7	11	2	0	6	4	39	0	0	.125	.163	.148	.311	-32.4	-12.2	.155	1.7
1947	39	87	78	6	10	1	0	2	8	37	0	0	.128	.209	.141	.350	-11.4	-6.1	.182	1.4
1948	35	49	44	2	5	2	0	4	1	16	0	0	.114	.152	.159	.311	-30.3	-16.1	.149	1.6
1949	39	80	69	4	10	2	2	7	5	27	0	0	.145	.203	.261	.464	15.2	23.7	.215	5.8
1950	40	72	65	4	8	1	1	6	6	24	0	0	.123	.197	.185	.382	-5.6	1.4	.186	2.2
1951	39	56	50	1	5	1	0	1	6	18	1	1	.100	.196	.120	.316	-17.1	-12.6	.168	2.4
1952	41	60	54	3	2	1	0	3	3	31	0	0	.037	.088	.056	.143	-78.4	-59.5	.078	2.3
1953	37	34	30	0	1	0	0	0	1	11	0	0	.033	.065	.033	.098	-91.9	-73.6	.053	0.3
1954	15	4	4	0	0	0	0	0	0	2	0	0	.000	.000	.000	.000	-135.2	-100.0	.000	0.5
1955	1	0	0	0	0	0	0	0	0	0	0	0	—	—	—	—	—	—	—	-0.1

Pitching

Season	G	GS	W	L	SV	CG	SHO	H	ER	BB	SO	HR	IP	ERA	WHIP	K/9	FIP	FIP-	ERA+	sWAR
1941	4	3	1	2	0	2	0	17	5	10	12	0	23.7	1.90	1.141	4.56	2.82	76.2	194.6	0.7
1942	19	11	3	6	0	3	1	79	44	32	42	7	78.0	5.08	1.423	4.85	3.64	110.0	65.2	-1.0
1946	40	35	14	19	1	17	3	251	107	101	121	15	265.3	3.63	1.327	4.10	3.34	96.5	95.4	1.7
1947	39	31	15	10	0	10	3	223	106	82	86	23	217.3	4.39	1.403	3.56	4.33	104.7	94.1	1.4
1948	35	18	8	10	3	5	3	168	64	62	58	7	149.0	3.87	1.544	3.50	3.67	91.8	103.3	1.6
1949	38	23	11	14	4	15	0	193	59	43	64	13	212.0	2.50	1.113	2.72	3.33	82.9	160.5	5.8
1950	40	22	13	15	3	7	1	190	81	68	56	18	186.7	3.91	1.382	2.70	4.28	104.1	105.4	2.2
1951	39	16	10	9	3	5	2	153	55	45	54	18	149.7	3.31	1.323	3.25	4.16	105.8	119.1	2.4
1952	41	17	10	7	5	8	2	154	59	47	67	10	166.3	3.19	1.208	3.63	3.28	87.7	117.0	2.3
1953	37	12	6	12	2	2	0	135	59	36	36	8	111.7	4.76	1.531	2.90	3.90	90.6	90.4	0.3
1954	15	1	1	2	1	0	0	33	11	12	10	1	31.7	3.13	1.421	2.84	3.32	89.2	119.0	0.5
1955	1	0	0	1	0	0	0	1	1	0	0	1	0.0	—	—	—	—	—	0.0	-0.1

sWAR is the season TOTAL for a player who both hit and pitched: the record book carries one figure per season, not a split, so the same number appears on both lines rather than being counted twice.

Career totals

Batting

350

571

516

RBI

222

.1085

OBP

.1682

SLG

.1492

OPS

.3174

Pitching

G (P)

348

189

107

474th-most career L

SHO

396th-most career SHO

1,591

SO (P)

606

BB allowed

538

ERA

3.682

WHIP

1.3416

K/9

3.43

A total is called out only where it ranks in the all-time top 500; hover a figure for its rank and the size of the field it was ranked in. Ranks are absolute facts and carry no percentile — the population for "career home runs" would be an editorial choice, and the rank is not.

Best games

Batting

Date	Game	AB	R	H	2B	HR	RBI	TB
1949-07-07	PHI @ SF Gameday	4	2	2	0	2	5	8
1950-07-16	SF @ CIN Gameday	3	1	2	0	1	2	5
1952-07-15	SF @ STL Gameday	3	1	2	1	0	2	3
1946-06-08	SF @ PIT Gameday	4	1	2	1	0	0	3
1950-07-20	SF @ STL Gameday	4	2	2	0	0	3	2

Pitching

Date	Game	IP	H	R	ER	BB	SO	HR
1947-08-01	SF @ PIT Gameday	9.0	6	1	1	0	9	0
1942-04-22	SF @ PHI Gameday	9.0	6	0	0	1	8	0
1946-07-07	PHI @ SF Gameday	9.0	7	1	1	2	8	0
1941-09-28	SF @ ATL Gameday	9.0	6	1	1	1	7	0
1946-06-12	SF @ CIN Gameday	7.0	4	3	1	3	7	1

Ranked from our own play-by-play game log, which begins in 1901 — not from the record book, so a career played outside it shows nothing here rather than a short list.