Also of Austrian stock, but later settled in Wisconsin. Worked as an engine builder, which is probably his greatest racing legacy, as he was one of only three manufacturers of a special overhead valve cylinder head for the Model T Fords, which so many racers used in the 1920's and 1930's. Jagersberger worked for Daimler as an engineering apprentice, joining them in the late 1890's in their factory in Stuttgart, Germany. He also worked as a riding mechanic in endurance races for many years and then in 1903 met John Jacob Astor IV, an American businessman in the fur industry who asked Joe to become his chauffeur. He then became one of America's early racers, but also raced in motorboats. He raced for the Case team, based in Racine, Wisconsin, which had high hopes of success, but his colleagues Strang and McNay both died and Joe had a crash that meant his right leg had to be amputated below the knee. His racing career was over but it led to his designing engine heads, which he did for most of the rest of his life.

Biography last updated 12 Aug 2015