Progress against the field
Between Rotterdam 2025 and Maastricht 2025, Jerfaas Haalboom lost 3:25 to the field.
The races barely moved for everyone else, so 3:05 slower on the clock is close to the whole story.
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
4 races · 4 events
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Rotterdam15 Apr 2026Doubles Open · MenDNF—
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Amsterdam21 Jan 2026Individual Pro · Men1:14:13 PB41/107Beat 62%
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Maastricht19 Sep 2025Individual Open · Men1:16:47219/1352Beat 84%
↑ 204 days after Rotterdam 2025 3:25 worse than the field Why ↓Close ↑
3:25 behind the field: 3:05 slower on the clock, against 0:20 faster for everyone.
The fieldCompare these two →0:20 faster This athlete3:05 slower -
Rotterdam27 Feb 2025Individual Open · Men1:13:42 PB159/1283Beat 88%