Where was Angels in the Outfield (1951) filmed?

1951 American comedy film

Angels in the Outfield (1951) was filmed in Los Angeles, Chicago, Pittsburgh, Oakland, Forbes Field and Wrigley Field, 6 places named in its Wikipedia article, in the United States. Wikidata records no filming location for it at all, so the article is the only recorded source. Each place says where its claim comes from.

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