Manufacturer: Bowman
Set: 1948 Bowman Baseball ➡️
Player Name: George “Dave ” Koslo
Position/Team: Pitcher for Giants
Card #: 48
Card Size: 2-1/16” x 2-1/2”
Card Value Snapshot: Raw/Ungraded: $20 | Grade 7: $350
⬇️ See More Pricing Data Below
George Bernard “Dave” Koslo was a left-handed pitcher in Major League Baseball )MLB) whose career spanned parts of 12 seasons (1941-1942, 1946-1955). He is primarily known for his time with the New York Giants and for his pivotal role in one of baseball’s most famous seasons. Koslo spent the bulk of his career with the Giants. Like many players of his era, his career was interrupted by military service in the U.S. Army during World War II.
Koslo played a significant role in the dramatic 1951 season for the New York Giants, which culminated in the famous “Shot Heard ‘Round the World” by Bobby Thomson. Koslo was the winning pitcher in Game 1 of the 1951 World Series against the New York Yankees, defeating the formidable Allie Reynolds.
Dave Koslo’s most recognized rookie card is this 1948 Bowman #48. This card is part of Bowman’s first nationally distributed baseball card set after World War II.
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Pricing Data For This Rookie Card
Tracking the current market value for the 1948 Bowman Dave Koslo Card #48. Below, find updated pricing data for ungraded (raw) copies, as well as verified PSA graded sales trends collected from secondary marketplaces.
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Raw/Ungraded: $20
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Grade 1: $30
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Grade 2: -
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Grade 3: $40
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Grade 4: $70
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Grade 5: $135
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Grade 6: $150
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Grade 7: $350
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Grade 8: $650
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Grade 9: -
Data Updated: July 2026
➡️ See All 1948 Bowman Rookie Card Prices
Pricing data includes raw card price & some graded card value estimates.
These values are collated from a variety of resources including recently sold listings, sales averages and a variety of other sports card pricing data sources. Please see full disclaimer on “Terms Page” for more information. (Rookiecardprices.com only shows values for regular base set cards. No prices are shown for errors, parallels, subsets, misprints or other cards unless noted.)
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