Marilyn Brown, Director of the Consumer Test Kitchen at H.J. Heinz in Pittsburgh, says their research at the Carnegie Library suggests that the sloppy joe's origins lie with the "loose meat sandwiches" sold in Sioux City, Iowa, in the 1930s and were the creation of a cook named Joe.
Marilyn Brown, Direktur Consumer Test Kitchen di H.J. Heinz di Pittsburgh, mengatakan penelitian mereka di Carnegie Library menunjukkan bahwa asal usul sloppy joe itu terletak pada "sandwich daging yang disuwir" yang dijual di Sioux City, Iowa pada 1930-an dan merupakan kreasi seorang juru masak bernama Joe.