Progress against the field
Between Oslo 2025 and Glasgow 2026, Jonathan O’Shea lost 12:30 to the field.
The clock says 9:17 slower, but the races themselves got 3:13 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
6 races · 6 events
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Glasgow11 Mar 2026Individual Open · Men1:59:29576/613Beat 6%
↑ 140 days after Birmingham 2025 10:42 worse than the field Why ↓Close ↑
8:15 slower on the clock in a race that was 2:27 faster for everyone: 10:42 lost to the field.
The fieldCompare these two →2:27 faster This athlete8:15 slower -
Birmingham22 Oct 2025Individual Open · Men1:51:141448/1600Beat 10%
↑ 26 days after Oslo 2025 1:48 worse than the field Why ↓Close ↑
1:02 slower on the clock in a race that was 0:46 faster for everyone: 1:48 lost to the field.
The fieldCompare these two →0:46 faster This athlete1:02 slower -
Oslo26 Sep 2025Individual Open · Men1:50:12294/319Beat 8%
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Rotterdam27 Feb 2025Individual Open · Men1:43:44 PB524/600Beat 13%
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Manchester24 Jan 2025Individual Open · Men1:48:081097/1191Beat 8%
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Frankfurt14 Dec 2024Individual Open · Men1:57:211412/1480Beat 5%