Graetz was employed as a fireman on the South Australian Railways and his senior rowing was from the Murray BridgeRowing Club. The Murray Bridge Rowing Club men's eight was the dominant Australian club eight of the 1920s. They won the SouthAustralian state championship from 1920 to 1923 and in 1921 by a margin of ten lengths. For the four years from 1920 to 1923 they were selected in-toto as the South Australian men's eight to contest the King's Cup at the Australian Interstate Regatta. Graetz was the bowman in each of those crews and rowed in those South Australian King's Cup victories of 1920, 1922 and 1923,.
International representative rowing
The South Australian media pushed for Graetz's victorious 1920 King's Cup eight to be sent to the 1920 Antwerp Olympics but with the Victorian and New South Wales Rowing Association in control of selections and funding, there wasn't sufficient support for their campaign. By 1924 with South Australia continuing to dominate Australian eights rowing, their claim could not be denied and after winning a test event raced on Port Adelaide in March 1924, Graetz and the South Australian crew were selected in-toto to represent Australia as an eight at the 1924 Summer Olympics. Funding was raised from the Murray Bridge Rowing Club, the South Australian Rowing Association and the general public of South Australia. The crew were nicknamed "the Murray Cods". Unlike the 1912 Olympic eight, the Murray Cods were not invited to race in lead-up at the Henley Royal Regatta and in 2000 Ted Thomas jnr a crew member's son, asserted that this was because the eight was crewed by working class men other than the stroke Bill Sladden It's undisputed that tour funds were scarce and on arrival in France, the crew had to row their shell 60 km to their training base; that on tour a number of the crew busked as musicians to raise pocket money; and that on race day they first rowed their shell 26 miles from their boatshed to the Olympic course. Their equipment was also sub-par as they rowed with their oars turning in out-rigged poppets rather than in swivelling gates as had become the norm by 1924. In the Olympic regatta, with Graetz in the bow, the Australian eight finished second behind Italy in their heat, then finished third in the repechage and didn't advance to the final. Harry Graetz continued on as a first-class oarsman after the Olympics. He was again in the bow of the South Australian representative eight in its King's Cup campaign of 1925.
