Sean Niewold

Personal Bests

Best times from available individual swims and official relay lead-offs. Career coverage may be incomplete. Select an event to show its progression.

2025 Mare Nostrum Canet En Roussillon · Canet En Roussillon, France · Meet 24–25 May 2025

—22.18

2026 European Aquatics Championships — Swimming · Paris La Défense Arena, Paris (FRA) · Meet 31 Jul–16 Aug 2026

—47.95relay lead-off

2026 TYR Pro Swim Series - Westmont · Westmont, United States of America · Meet 4–7 Mar 2026

—23.04

2026 TYR Pro Swim Series - Westmont · Westmont, United States of America · Meet 4–7 Mar 2026

—51.83

All Results 77 swims · 16 meets

Meet dates describe the competition. Race dates are shown per swim where available.

2026 World Aquatics Swimming World Cup · Astana · Meet 15–17 Oct 2026

50 Freestyle SCM

—Final421.14

50 Freestyle SCM

—Heat621.40

50 Butterfly SCM

—Final922.58

50 Butterfly SCM

—Heat922.74

100 Freestyle SCM

—Final346.72

100 Freestyle SCM

—Heat146.83

100 Butterfly SCM

—Heat1051.63

100 Butterfly SCM

—Final1051.66

2026 World Aquatics Swimming World Cup · Tashkent · Meet 8–10 Oct 2026

50 Freestyle SCM

—Final421.11

50 Freestyle SCM

—Heat221.36

50 Butterfly SCM

—Final822.54

50 Butterfly SCM

—Heat322.73

100 Freestyle SCM

—Final446.75

100 Freestyle SCM

—Heat147.34

100 Butterfly SCM

—Heat351.89

2026 World Aquatics Swimming World Cup · Baku · Meet 1–3 Oct 2026

50 Freestyle SCM

—Final320.82

50 Freestyle SCM

—Heat221.43

50 Butterfly SCM

—Final422.35

50 Butterfly SCM

—Heat222.51

50 Backstroke SCM

—Heat724.55

100 Freestyle SCM

—Final546.95

100 Freestyle SCM

—Heat247.38

100 Butterfly SCM

—Heat352.52

100 IM SCM

—Heat855.76

2026 NCAA Division I Men's Swimming & Diving · Meet 25–28 Mar 2026

50y Freestyle SCY25 Mar 2026

25 Mar 2026Preliminary1118.79

100y Freestyle SCY25 Mar 2026

25 Mar 2026Preliminary1941.65

100y Butterfly SCY25 Mar 2026

25 Mar 2026Preliminary1744.98

2026 TYR Pro Swim Series - Westmont · Westmont, United States of America · Meet 4–7 Mar 2026

50 Butterfly LCM

—Heat123.04

50 Butterfly LCM

—Final223.13

100 Freestyle LCM

—Heat348.81

100 Butterfly LCM

—Heat151.83

2026 SEC Swimming and Diving Championships · Meet 16–21 Feb 2026

50 Freestyle SCY

—Consolation Final918.94

50 Freestyle SCY

—Preliminary1019.14

100 Freestyle SCY

—Preliminary9X41.93

100 Freestyle SCY

—Consolation Final1242.02

100 Butterfly SCY

—Preliminary545.08

100 Butterfly SCY

—Championship Final745.13

2025 Mare Nostrum Canet En Roussillon · Canet En Roussillon, France · Meet 24–25 May 2025

50 Freestyle LCM

—Final A222.18

50 Butterfly LCM

—Final A523.51

50 Butterfly LCM

—Heat 1323.59

100 Freestyle LCM

—Final A449.28

100 Freestyle LCM

—Heat 1749.94

2025 Mare Nostrum Monaco · Monaco, Monaco · Meet 17–18 May 2025

50 Freestyle LCM

—Heat 11022.85

50 Butterfly LCM

—Heat 1223.38

100 Freestyle LCM

—Heat 1149.35

100 Butterfly LCM

—Heat 1653.06

2024 Olympic Games Paris · Meet 26 Jul–11 Aug 2024

100 Freestyle LCM

—Heat348.82

2024 Mare Nostrum MON · Monaco, Monaco · Meet 1–2 Jun 2024

50 Freestyle LCM

—Heat 1222.46

100 Freestyle LCM

—Heat 1248.81

100 Butterfly LCM

—Heat 1652.67

2023 World Aquatics Swimming World Cup - Budapest · Meet 20–22 Oct 2023

50 Freestyle SCM

—Heat1022.39

50 Butterfly SCM

—Heat1023.87

100 Freestyle SCM

—Heat949.22

2023 World Aquatics Swimming World Cup - Athens · Meet 13–15 Oct 2023

50 Freestyle SCM

—Swim-off heat222.39

50 Freestyle SCM

—Heat822.49

50 Butterfly SCM

—Final723.77

50 Butterfly SCM

—Heat723.79

100 Freestyle SCM

—Heat1149.96

2023 World Aquatics Swimming World Cup - Berlin · Meet 6–8 Oct 2023

50 Butterfly SCM

—Heat1123.92

100 Freestyle SCM

—Final749.23

100 Freestyle SCM

—Heat749.33

50 Freestyle SCM

—Heat—DQ

2022 FINA Swimming World Cup · Berlin · Meet 21–23 Oct 2022

50 Freestyle SCM

—Heat822.51

50 Butterfly SCM

—Heat924.07

100 Freestyle SCM

—Heat648.83

100 Butterfly SCM

—Heat1053.73

2021 FINA Swimming World Cup · Berlin · Meet 1–3 Oct 2021

50 Freestyle SCM

—Heat3523.63

50 Butterfly SCM

—Heat1623.72

100 Freestyle SCM

—Heat3649.62

100 Butterfly SCM

—Heat852.55

100 Butterfly SCM

—Final852.59

2016 FINA/airweave Swimming World Cup · Dubai · Meet 4–5 Oct 2016

50 Freestyle SCM

—Heat226.54

50 Butterfly SCM

—Heat128.36

50 Backstroke SCM

—Heat730.22

100 Freestyle SCM

—Heat458.26

100 Backstroke SCM

—Heat81:04.64

100 Breaststroke SCM

—Heat71:13.05