What years did Lou Sleater play?

Lou Sleater played in Major League Baseball from 1950 to 1958.

Was Lou Sleater a pitcher?

Yes. Lou Sleater pitched in the major leagues, recording 12 wins and 152 strikeouts.

How many home runs did Lou Sleater hit?

Lou Sleater hit 4 career home runs with 21 hits.

What was Lou Sleater's career batting average?

Lou Sleater batted .204 over his career, with 21 hits in 103 at bats.

How many RBI did Lou Sleater have?

Lou Sleater drove in 12 runs in his career.

What was Lou Sleater's career ERA?

Lou Sleater finished with a 4.70 career ERA, going 12-18 with 152 strikeouts.

Lou Sleater

Pitcher · Career Stats, Bio & Records (1950-1958)

Lou Sleater was a pitcher who played in Major League Baseball from 1950 to 1958 for 6 teams, including the St. Louis Browns, a span of 9 seasons. Across 131 career appearances, he went 12-18 with a 4.70 ERA and 152 strikeouts.

W (Wins):: Games credited to a pitcher whose team took a lead it never surrendered while he was the pitcher of record.
ERA (Earned Run Average):: Earned runs allowed per nine innings pitched: (ER × 9) ÷ IP. The primary measure of pitching effectiveness.
SO (Strikeouts):: For a batter, times retired on a third strike; for a pitcher, batters retired on a third strike.
WHIP (Walks and Hits per Inning Pitched):: Baserunners allowed per inning: (BB + H) ÷ IP. Under 1.00 is elite.

Data updated October 12, 2026

W–L 12–18

ERA 4.70

WHIP 1.59

SO 152

Pitcher PIV -4617.0

Position: Pitcher
Bats / Throws: L / L
Height / Weight: 5'11" / 185 lb
Born: 9/8/1926 in St. Louis, MO, USA
Died: 3/25/2013 in Timonium, MD, USA
MLB Debut: 1950-04-25
Last Game: 1958-09-28

Full name: Louis Mortimer Sleater

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Career Pitching Statistics

Lou Sleater — Career Pitching Statistics
W	L	G	GS	CG	SHO	SV	IP	H	ER	HR	BB	SO	ERA	Pitcher PIV
12	18	131	21	7	1	5	300.2	306	157	32	172	152	4.70	-4617.0

Career ERA 4.70 vs. league average 3.96 across their career seasons — 18.5% worse than league average.

Season-by-Season Pitching

Pitching Career Arc

Click a stat to plot it across every season.

Lou Sleater Stats, Bio & Career Records
Year	Team	Lg	W	L	G	GS	CG	SHO	SV	IP	H	ER	BB	SO	ERA	Lg ERA	Pitcher PIV
1950	SLA	AL	0	0	1	0	0	0	0	1.0	0	0	0	1	0.00	—	0.0
1951	SLA	AL	1	9	20	8	4	0	1	81.0	88	46	53	33	5.11	4.04 (-27%)	-1814.8
1952	SLA	AL	0	1	4	2	0	0	0	8.2	9	7	5	1	7.27	—	0.0
1952	WS1	AL	4	2	14	9	3	1	0	57.0	56	23	30	22	3.63	3.70 (+2%)	-730.4
1955	KC1	AL	1	1	16	1	0	0	0	25.2	33	22	21	11	7.71	4.00 (-93%)	-953.8
1956	ML1	NL	2	2	25	1	0	0	2	45.2	42	16	27	32	3.15	3.96 (+20%)	-553.9
1957	DET	AL	3	3	41	0	0	0	2	69.1	61	29	28	43	3.76	3.83 (+2%)	-564.1
1958	DET	AL	0	0	4	0	0	0	0	5.1	3	4	6	4	6.75	—	0.0
1958	BAL	AL	1	0	6	0	0	0	0	7.0	14	10	2	5	12.86	—	0.0
Career · 9 seasons			12	18	131	21	7	1	5	300.2	306	157	172	152	4.70	—	-4,617

Lg columns show the league average for that season, with the player's figure as a percentage above or below it. Career totals the seasons listed above.

Career Batting Statistics

Lou Sleater — Career Batting Statistics
G	AB	R	H	2B	3B	HR	RBI	SB	BB	SO	AVG	OBP	SLG	OPS	PIV
145	103	8	21	0	1	4	12	0	4	11	.204	.234	.340	.573	0

Career AVG .204 vs. league average .259 across their career seasons — 21.2% below league average.

Career OBP .234 vs. league average .332 across their career seasons — 29.6% below league average.

Career SLG .340 vs. league average .391 across their career seasons — 13.0% below league average.

Career OPS .573 vs. league average .722 across their career seasons — 20.6% below league average.

Season-by-Season Batting

Career Arc

Click a stat to plot it across every season.

Lou Sleater Stats, Bio & Career Records
Year	Team	Lg	G	AB	R	H	3B	HR	RBI	BB	SO	AVG	Lg AVG	Lg OBP	Lg SLG	Lg OPS	PIV
1950	SLA	AL	1	0	0	0	0	0	0	0	0	.000	—	—	—	—	0.0
1951	SLA	AL	25	31	2	7	1	0	1	2	5	.226	—	—	—	—	0.0
1952	SLA	AL	4	2	0	0	0	0	0	0	0	.000	—	—	—	—	0.0
1952	WS1	AL	15	20	0	1	0	0	1	0	0	.050	—	—	—	—	0.0
1955	KC1	AL	21	13	0	2	0	0	0	0	0	.154	—	—	—	—	0.0
1956	ML1	NL	25	10	1	5	0	0	2	1	3	.500	—	—	—	—	0.0
1957	DET	AL	41	20	4	5	0	3	7	1	2	.250	—	—	—	—	0.0
1958	DET	AL	4	1	1	1	0	1	1	0	0	1.000	—	—	—	—	0.0
1958	BAL	AL	9	6	0	0	0	0	0	0	1	.000	—	—	—	—	0.0
Career · 9 seasons			145	103	8	21	1	4	12	4	11	.204	—	—	—	—	0

Lg columns show the league average for that season, with the player's figure as a percentage above or below it. Career totals the seasons listed above.

Game Log & Splits

View full game log (276 games) →

Per-game data from Retrosheet (regular season, through 2025).

Batting — Home / Away

Lou Sleater — Batting — Home / Away
Split	G	AB	R	H	HR	RBI	AVG
Home	81	58	6	13	4	9	.224
Away	64	46	2	8	0	3	.174

Pitching — Home / Away

Lou Sleater — Pitching — Home / Away
Split	G	IP	H	ER	BB	SO	ERA
Home	71	168.1	160	76	106	82	4.06
Away	60	132.1	146	81	66	69	5.51

Last 10 Games — Batting

Lou Sleater — Last 10 Games — Batting
Date	Tm	Opp	Res	AB	SO
1958-09-28	BAL	NYY	L	1	0
1958-09-19	BAL	NYY	W	1	1
1958-08-27	BAL	CLE	L	0	0
1958-08-12	BAL	NYY	L	0	0
1958-06-14	BAL	CHW	L	0	0
1958-06-13	BAL	CHW	L	1	0
1958-06-10	BAL	CLE	L	1	0
1958-06-04	BAL	DET	W	1	0
1958-06-02	BAL	MIN	L	1	0
1958-05-23	DET	NYY	L	0	0

Last 10 Games — Pitching

Lou Sleater — Last 10 Games — Pitching
Date	Tm	Opp	Dec	IP	H	R	ER	BB	SO	HR
1958-09-28	BAL	NYY	—	2.0	3	2	2	0	1	0
1958-09-19	BAL	NYY	W	2.0	1	0	0	0	2	0
1958-08-27	BAL	CLE	—	0.2	3	2	2	0	1	0
1958-08-12	BAL	NYY	—	0.1	0	0	0	0	1	0
1958-06-14	BAL	CHW	—	1.0	4	4	4	1	0	0
1958-06-10	BAL	CLE	—	1.0	3	2	2	1	0	0
1958-05-23	DET	NYY	—	1.0	0	0	0	1	0	0
1958-05-21	DET	BAL	—	1.2	1	2	2	2	1	1
1958-05-15	DET	CLE	—	1.0	1	2	2	3	0	1
1958-04-18	DET	CLE	—	1.2	1	0	0	0	3	0

Fielding Statistics

Career Fielding Totals by Position

Lou Sleater — Career Fielding Totals by Position
Position	G	GS	PO	A	E	DP
P	131	2	11	47	6	3

Season-by-Season Fielding

Lou Sleater — Season-by-Season Fielding
Year	Team	Pos	G	GS	PO	A	E	DP
1950	SLA	P	1	0	0	0	0	0
1951	SLA	P	20	0	2	10	1	1
1952	SLA	P	4	0	0	2	0	0
1952	WS1	P	14	0	0	6	1	0
1955	KC1	P	16	1	2	3	0	0
1956	ML1	P	25	1	4	11	0	0
1957	DET	P	41	0	2	11	3	2
1958	DET	P	4	0	0	2	0	0
1958	BAL	P	6	0	1	2	1	0

Career Games by Position

Position Diamond

Circle size = games played at each position.

Lou Sleater Stats, Bio & Career Records
Position	Games
Pitcher	131

Lou Sleater: the record in brief

Lou Sleater played a first major league game on April 25, 1950 and a last one on September 28, 1958. The team column moves through the St. Louis Browns (1950 through 1952), the Washington Senators (1952), the Kansas City Athletics (1955), the Milwaukee Braves (1956), the Detroit Tigers (1957 to 1958), and the Baltimore Orioles (1958). Sleater played primarily as a pitcher and both batted and threw left-handed. The bio adds a birth date on September 8, 1926, in St. Louis, MO, USA and a listed size of 5'11" and 185 pounds. The bio records the death on March 25, 2013, in Timonium, MD, USA. Sleater's full given name, per the bio, is Louis Mortimer Sleater.

Across 131 games (21 starts), Sleater recorded 12 wins against 18 losses with a 4.70 ERA. Sleater had 152 strikeouts. The league ERA over Sleater's seasons was 3.96, so the 4.70 figure ran 18.5% worse than average. 1952 was Sleater's sharpest full season, a 3.63 ERA against the league's 3.70.

Frequently Asked Questions about Lou Sleater

What years did Lou Sleater play?: Lou Sleater played in Major League Baseball from 1950 to 1958.
Was Lou Sleater a pitcher?: Yes. Lou Sleater pitched in the major leagues, recording 12 wins and 152 strikeouts.
How many home runs did Lou Sleater hit?: Lou Sleater hit 4 career home runs with 21 hits.
What was Lou Sleater's career batting average?: Lou Sleater batted .204 over his career, with 21 hits in 103 at bats.
How many RBI did Lou Sleater have?: Lou Sleater drove in 12 runs in his career.
What was Lou Sleater's career ERA?: Lou Sleater finished with a 4.70 career ERA, going 12-18 with 152 strikeouts.