Cassie O'BYRNE | Profile | World Athletics

Cassie O'BYRNE

300m

200m

400m

200m sh

400m sh

Ireland

Born23 APR 2008 (17)

Cassie's code15137826

Current World Rankings

#1920 Woman's 400m

Personal bests

Result

39.92

Date

15 MAY 2024

Score

962

Competition & venue

Morton Stadium, Santry, Dublin (IRL)

Result

25.06

Date

12 JUL 2025

Score

936

Result

57.43

Date

27 JUL 2025

Score

925

Competition & venue

Tullamore Harriers AC Stadium, Tullamore (IRL)

Result

25.85

Date

07 APR 2024

Score

919

Competition & venue

AIT International Arena, Athlone (IRL) (i)

Result

58.69

Date

06 APR 2024

Score

916

Competition & venue

AIT International Arena, Athlone (IRL) (i)

* Not legal

Season’s bests (2025)

* Not legal

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