What does JC mean in Unclassified?
This page is about the meanings of the acronym/abbreviation/shorthand JC in the Miscellaneous field in general and in the Unclassified terminology in particular.
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What does JC mean?
- John Costello
- John Reilly Costello is a former relief pitcher in Major League Baseball who played for the St. Louis Cardinals, Montreal Expos and San Diego Padres. He batted and threw right-handed. In a four-season career, Costello posted a 11-6 record with a 2.97 ERA and four saves in 119 games pitched.