Progress against the field
Between Manchester 2022 and Birmingham 2023, Aaron O'Brien pulled 12:27 ahead of the field.
Over the same races everyone got 5:48 quicker, so 18:15 faster on the clock looks better than it was.
The longest gap between two races compared here, 371 days between Birmingham 2022 and Birmingham 2023, still ended 4:29 ahead of the field.
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
5 races · 5 events
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Manchester21 Jan 2026Doubles Pro · Men1:08:44 PB30/53Beat 43%
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Birmingham22 Oct 2025Relay · Men55:239/54Beat 83%
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Birmingham21 Oct 2023Individual Open · Men1:12:02 PB100/1182Beat 92%
↑ 371 days after Birmingham 2022 4:29 better than the field Why ↓Close ↑
4:29 better than the field: 5:35 faster on the clock, against 1:06 faster for everyone.
The fieldCompare these two →1:06 faster This athlete5:35 faster -
Birmingham15 Oct 2022Individual Open · Men1:17:37223/960Beat 77%
↑ 259 days after Manchester 2022 7:58 better than the field Why ↓Close ↑
12:40 faster on the clock, and the race was 4:42 faster for everyone, so 7:58 of it was this athlete.
The fieldCompare these two →4:42 faster This athlete12:40 faster -
Manchester29 Jan 2022Individual Open · Men1:30:17279/476Beat 41%