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Jack Armstrong is a swimmer who competes internationally for the United States. His last victory is the men's 4x100 m freestyle during the World Junior Championships 2019. He competes in 4x100 m freestyle and 4x100 m medley.
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Event | Discipline | Pos | Date |
---|---|---|---|
World Junior Championships | Men's 4x100 m medley | 2 | 25/08/2019 |
World Junior Championships | Men's 4x100 m freestyle | 1 | 20/08/2019 |