JSTOR Labs is developing a new tool to help baseball researchers by building a knowledge graph connecting people, places, organizations, and events mentioned in a collection of baseball-related articles and data sources. They conducted a flash build at the Library of Congress to develop an initial prototype by extracting entities from articles, linking them to Wikidata records about baseball, and incorporating additional data sources. The tool will be released as a proof of concept on labs.jstor.org and has potential to be expanded by adding more data, correcting errors through crowdsourcing, and expanding beyond baseball in the future.