Dave Koslo

George Bernard "Dave" Koslo (born George Bernard Koslowski, March 31, 1920 – December 1, 1975) was a professional baseball left-handed pitcher over parts of twelve seasons (1941–1942, 1946–1955) with the New York Giants, Baltimore Orioles and Milwaukee Braves. On April 18, 1947, Koslo gave up Jackie Robinson’s first major league home run, hit in the third inning. He was the National League ERA champion in 1949 with New York. For his career, he compiled a 92–107 record in 348 appearances, with a 3.68 ERA and 606 strikeouts.

He was born and later died in Menasha, Wisconsin, at the age of 55.

#48 George Dave Koslo (SHORT-PRINT ROOKIE)
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1948 Bowman Baseball Cards
Giants
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PSA 6 - EX/MT
 $280 
$252 after 10% discount
2
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Excellent - 5
 $145 
$131 after 10% discount
1
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Good - 2
 $56.50 
$54 after 5% discount
2
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Poor - 1
$13.00
2
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#34 Dave Koslo
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1949 Bowman Baseball Cards
Giants
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Excellent/Mint - 6
$31.00
1
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Very Good/Excellent - 4
$16.50
1
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Very Good - 3
$9.75
1
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Good - 2
$4.75
6
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#65 Dave Koslo
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1950 Bowman Baseball Cards
Giants
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PSA 7 - NM
 $98.00 
$93 after 5% discount
1
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Excellent - 5
$46.50
1
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Very Good/Excellent - 4
$28.00
1
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Very Good+ - 3.5
$19.00
1
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Very Good - 3
$15.00
1
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Good - 2
$7.75
3
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#90 Dave Koslo
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1951 Bowman Baseball Cards
Giants
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Near Mint - 7
 $88.00 
$84 after 5% discount
1
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Very Good/Excellent+ - 4.5
$49.50
1
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Very Good/Excellent - 4
$47.50
1
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Good - 2
$25.00
1
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Fair - 1.5
$11.00
2
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Poor - 1
$7.75
1
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#182 Dave Koslo
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1952 Bowman Baseball Cards
Giants
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Very Good/Excellent - 4
$42.50
1
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Very Good - 3
$34.50
1
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Good - 2
$21.50
1
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Poor - 1
$8.00
2
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#336 Dave Koslo
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1952 Topps Baseball Cards
Giants
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PSA 6 - EX/MT
 $1,230 
$984 after 20% discount
1
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PSA 1 - POOR
 $170 
$153 after 10% discount
1
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Dave Koslo
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1952 Berk Ross
Giants
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Excellent - 5
$19.00
1
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Very Good/Excellent - 4
$13.00
1
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Dave Koslo
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1947 Tip Top Bread Reprints
Giants
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Near Mint/Mint - 8
$2.35
3
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#48 Dave Koslo (ROOKIE)
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1948 Bowman Reprint
Giants
Qty
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Near Mint/Mint - 8
$0.89
6
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#34 Dave Koslo
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1949 Bowman Reprint
Giants
Qty
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Near Mint/Mint - 8
$0.89
6
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#65 Dave Koslo
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1950 Bowman Reprint
Giants
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Near Mint/Mint - 8
$0.89
6
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#90 Dave Koslo
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1951 Bowman Reprint
Giants
Qty
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Near Mint/Mint - 8
$0.89
4
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#182 Dave Koslo
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1952 Bowman Reprint
Giants
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Near Mint/Mint - 8
$2.85
2
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