The third round opens at Pittsburgh's Forbes Field with a pair of two-fight cards.
On Friday night, sixth-seeded Young Stribling faces No. 11 George Godfrey and No. 4 Max Schmeling takes on No. 13 Tuffy Griffiths.
Billy Miske (No. 7) opens the show on Saturday against the Wild Bull of the Pampas, No. 23 Luis Firpo, with second-seeded Gene Tunney squaring off with No. 18 Primo Carnera in the main event.