Among the ads on the fence is one for "Mike Maltese, Ace Detective" featuring a picture of Michael Maltese (the writer of "Baseball Bugs") with a fedora and a pistol.
The Gas-House Gorillas are a reference to the 1934 St. Louis Cardinals, who were nicknamed the Gashouse Gang.
The final lines in the cartoon, with both the Statue of Liberty and Bugs saying "That's what the man said! You heard what he said, he said that!" is a recurring line from Rochester on The Jack Benny Program.
When Bugs tags the runner out at home he holds up a sign that says "Was this trip really necessary?". This is a reference to WWII posters, admonishing people not to waste rubber and gas. Posters said ""Is Your Trip Necessary?".
One of the billboards surrounding the ball field advertises "Filboid Studge". This is a fictional breakfast food that figures centrally in a short story of the same title by the British author Hector Hugh Munro (aka Saki). In the story, an unappetizing and commercially failing breakfast product is turned into a phenomenal success through a cynical, outrageous advertising campaign.