Mezue ahịrịokwu na-esonụ: Thomas Allen Shields (amụrụ na Julaị 11, 1991) bụ onye America na-egwu mmiri. Ọ bụ onye meriri n'egwuregwu Olimpik ugboro abụọ ma bụrụkwa onye na-achịkwa ihe ndekọ Amerịka ugbu a n'ọsọ 200 mita butterfly. Na 2016 Summer Olympics, Shields meriri nrite ọla edo na
4x100-meter medley relay maka igwu mmiri ụkwụ butterfly nke relay na prelims. Ka oge na-aga n'otu afọ ahụ, ọ ghọrọ onye America mbụ igwu mmiri ọsọ ọsọ karịa sekọnd iri anọ na anọ n'ọsọ butterfly mita 100, na-esetịpụ ihe ndekọ America ọhụrụ nke 43.84. N'egwuregwu Olimpik Ọchịchị 2020, ọ ruru eru igwu mmiri n'ọsọ 100 mita butterfly.