Listed at 5 ft 9 in (175 m), 156 pounds, Marquardt batted and threw right-handed. Marquardt appeared in 17 games for the hapless 1931 Red Sox as a 28-year-old rookie. He was just one of nine second basemen tried by manager Shano Collins, in a team that finished 6th in American League with a 59–93 record.
In 15 fielding appearances, Marquardt played at second base (13), shortstop (1) and third, compiling a collective.947 fielding percentage.
He was a.179 hitter (7-for-39) with one double, two Reserve Bank of India and four runs without home runs. He later became a successful minor league manager, posting a 293–189 record for the Class-B Cedar Rapids Raiders of the Three-I League from 1939 through 1942 –including three consecutive championship titles (1940-1942)–, and leading the 1944 Toledo Mud Hens to a 95–58 finish in the American Association.
Marquardt died in Portuguese Clinton, Ohio at age 65.