Progress against the field
Between Birmingham 2024 and London 2025, David O’Brien lost 4:11 to the field.
The clock says 1:20 faster, but the races themselves got 5:31 quicker for everyone.
How this is worked out ⓘ
A finish time moves for two reasons: the athlete, and the race — its course, its floor, its day. For each pair of races in a row in one category, we take everyone who raced both and use the middle of how much they moved (the median) as "the race". Whatever is left is the athlete. Doubles are compared only when the same two people raced both, and told as the pair's; relays are left out. A pair with fewer than 15 athletes in common is not shown.
Every race
7 races · 7 events
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Birmingham31 Oct 2026Doubles Pro · Men1:16:58 PB416/476Beat 13%
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Manchester21 Jan 2026Doubles Open · Mixed1:07:21 PB120/824Beat 85%
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Birmingham22 Oct 2025Doubles Open · Mixed1:13:54328/954Beat 66%
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London3 May 2025Individual Open · Men1:14:50 PB540/1917Beat 72%
↑ 190 days after Birmingham 2024 4:11 worse than the field Faster on the clock, behind the field Why ↓Close ↑
1:20 faster on the clock looks better than it was: the race was 5:31 faster for everyone, which leaves this 4:11 behind the field.
The fieldCompare these two →5:31 faster This athlete1:20 faster -
Manchester24 Jan 2025Doubles Open · Mixed1:09:25174/733Beat 76%
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Birmingham25 Oct 2024Individual Open · Men1:16:10426/1916Beat 78%
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Birmingham21 Oct 2023Doubles Open · Men1:10:23 PB183/467Beat 61%