[5] He played for Düsseldorfer SC 1899 [de] (1904–06, 1914–20), and Karlsruher FV (1906–14)—winning the German national title in 1910, beating Holstein Kiel 1–0.

[1] Fuchs was part of the legendary attacking trio of Karlsruher FV with Fritz Förderer and Julius Hirsch (who was killed in Auschwitz).

[5][2] He is remembered for scoring a world record 10 goals for Germany in a 16–0 win against Russia at the 1912 Olympics in Stockholm on 1 July, becoming the top scorer of the tournament; his international record was not surpassed until 2001 when Australia's Archie Thompson scored 13 goals in a 31–0 defeat of American Samoa.

[2][6][7][5] This performance of 10 goals in one international match tied a record set by Sophus Nielsen at the 1908 Summer Olympics, which remained on the books until 2001.

[1] He served in the German Army in World War I as an artillery officer and was awarded the Iron Cross.