Progress against the field
Between Malaga 2025 and Cardiff 2026, Zach Aherne lost 10:19 to the field.
The clock says 7:04 slower, but the races themselves got 3:15 quicker for everyone.
The largest gain on the field came from Malaga 2025 → Cardiff 2025: 4:08 in 70 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
7 races · 7 events
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Cardiff29 Apr 2026Individual Pro · Men1:36:17465/533Beat 13%
↑ 98 days after Manchester 2026 2:51 better than the field Why ↓Close ↑
2:51 better than the field: 5:14 faster on the clock, against 2:23 faster for everyone.
The fieldCompare these two →2:23 faster This athlete5:14 faster -
Manchester21 Jan 2026Individual Pro · Men1:41:31117/121Beat 3%
↑ 48 days after London Excel 2025 9:14 worse than the field Why ↓Close ↑
9:14 behind the field: 12:03 slower on the clock, against 2:49 slower for everyone.
The fieldCompare these two →2:49 slower This athlete12:03 slower -
London Excel4 Dec 2025Individual Pro · Men1:29:28391/462Beat 15%
↑ 22 days after Dublin 2025 1:22 worse than the field Faster on the clock, behind the field Why ↓Close ↑
0:17 faster on the clock, yet the race was 1:39 faster for everyone, so 1:22 was lost on the field.
The fieldCompare these two →1:39 faster This athlete0:17 faster -
Dublin12 Nov 2025Individual Pro · Men1:29:45118/147Beat 20%
↑ 166 days after Cardiff 2025 6:42 worse than the field Why ↓Close ↑
5:35 slower on the clock in a race that was 1:07 faster for everyone: 6:42 lost to the field.
The fieldCompare these two →1:07 faster This athlete5:35 slower -
Cardiff30 May 2025Individual Pro · Men1:24:10 PB161/225Beat 28%
↑ 70 days after Malaga 2025 4:08 better than the field Why ↓Close ↑
5:03 faster on the clock, and the race was 0:55 faster for everyone, so 4:08 of it was this athlete.
The fieldCompare these two →0:55 faster This athlete5:03 faster -
Malaga21 Mar 2025Individual Pro · Men1:29:13171/206Beat 17%
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Dublin15 Nov 2024Individual Pro · Men2:00:3885/90Beat 6%