Mezue ahịrịokwu na-esonụ: Na Rio de Janeiro Olympics, Chalmers meriri nrite ọlaedo na
100 mita freestyle n'ọkwa ụwa ọhụrụ nke 47.58, onye Australia mbụ mere nke ahụ kemgbe Michael Wenden na 1968. O jikwa oge kachasị ọsọ na-egwu mmiri n'oge okpomọkụ, na 47.90 s ya na-emebi ndekọ ụwa nke ya. Na 4x100 mita freestyle relay, o nyere aka na Australia were ọla nchara. Na medley relay, o nwere nkewa kachasị ọsọ nke ubi na oge nke 46.72, nke nyeere ndị otu aka inweta ọla nchara. N'akụkọ ihe mere eme naanị Pieter van den Hoogenband (46.70 na 2003), Vladimir Morozov ((46.69 na 2017), Cameron McEvoy ((46.60 na 2015) na Duncan Scott (46.14 na 2019 na Jason Lezak (46.06 na 2019) adịla ngwa ngwa na textile swimwear.