Progress against the field
Mark Greidanus has dropped 7:49 behind the field from Amsterdam 2023 to Rotterdam 2026.
Over the same races everyone got 13:12 quicker, so 5:23 faster on the clock looks better than it was.
412 days between Rotterdam 2025 and Rotterdam 2026 is the longest gap compared here, and the second race was 2:20 behind 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
4 races · 4 events
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Rotterdam15 Apr 2026Individual Open · Men1:28:30 PB308/570Beat 46%
↑ 412 days after Rotterdam 2025 2:20 worse than the field Faster on the clock, behind the field Why ↓Close ↑
1:48 faster on the clock, yet the race was 4:08 faster for everyone, so 2:20 was lost on the field.
The fieldCompare these two →4:08 faster This athlete1:48 faster -
Rotterdam27 Feb 2025Individual Open · Men1:30:18769/1283Beat 40%
↑ 327 days after Rotterdam 2024 1:14 worse than the field Faster on the clock, behind the field Why ↓Close ↑
5:20 faster on the clock, yet the race was 6:34 faster for everyone, so 1:14 was lost on the field.
The fieldCompare these two →6:34 faster This athlete5:20 faster -
Rotterdam6 Apr 2024Individual Open · Men1:35:38851/1380Beat 38%
↑ 154 days after Amsterdam 2023 4:15 worse than the field Why ↓Close ↑
1:45 slower on the clock in a race that was 2:30 faster for everyone: 4:15 lost to the field.
The fieldCompare these two →2:30 faster This athlete1:45 slower -
Amsterdam4 Nov 2023Individual Open · Men1:33:53665/1079Beat 38%