Progress against the field
Summer Casey has gained 14:00 on the field from Birmingham 2025 to Manchester 2026.
The clock says 16:38 faster, but the races themselves got 2:38 quicker for everyone.
The largest gain on the field came from London Excel 2025 → Manchester 2026: 12:17 in 48 days.
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
3 races · 3 events
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Manchester21 Jan 2026Individual Open · Women1:35:19 PB447/825Beat 46%
↑ 48 days after London Excel 2025 12:17 better than the field Why ↓Close ↑
The race was 0:26 slower for everyone and the clock still says 11:51 faster: 12:17 gained on the field.
The fieldCompare these two →0:26 slower This athlete11:51 faster -
London Excel4 Dec 2025Individual Open · Women1:47:101060/1379Beat 23%
↑ 43 days after Birmingham 2025 1:43 better than the field Why ↓Close ↑
4:47 faster on the clock, and the race was 3:04 faster for everyone, so 1:43 of it was this athlete.
The fieldCompare these two →3:04 faster This athlete4:47 faster -
Birmingham22 Oct 2025Individual Open · Women1:51:57320/380Beat 16%