Per wikipedia: "In 1915, at age 20, he founded the New Haven MaxFeds in the independent Colonial League, an "outlaw" minor league associated with the Federal League. In 1919, Weiss borrowed $5,000 to acquire the New Haven franchise in the established Class A Eastern League; his team was immediately nicknamed the Weissmen by local baseball writers. He operated the New Haven club, eventually nicknamed the Profs in tribute to Yale, for a decade; it won three league championships between 1920 and 1928."
Same image from a publication identifying Weiss:
Old Cardboard has Weiss listed as having no career-contemporary cards, so this would be one.