Progress against the field
Between Heerenveen 2025 and Rotterdam 2026, Roelof De Roos kept pace with the field.
Over the same races everyone got 4:20 quicker, so 4:13 faster on the clock looks better than it was.
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. The summary above covers Individual Open · Men, the one raced most; every comparison is in the list below.
Every race
4 races · 4 events
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Heerenveen14 May 2026Doubles Open · Men59:14 PB30/494Beat 94%
↑ 167 days after Utrecht 2025, with Michiel Hornstra 1:17 worse than the field Faster on the clock, behind the field Why ↓Close ↑
2:01 faster on the clock looks better than it was: the race was 3:18 faster for everyone, which leaves this 1:17 behind the field.
The fieldCompare these two →3:18 faster This pair2:01 faster -
Rotterdam15 Apr 2026Individual Open · Men1:15:54 PB118/570Beat 79%
↑ 341 days after Heerenveen 2025 0:07 worse than the field Why ↓Close ↑
4:13 faster on the clock, and the race was 4:20 faster for everyone. Whatever changed, it changed for all of them.
The fieldCompare these two →4:20 faster This athlete4:13 faster -
Utrecht28 Nov 2025Doubles Open · Men1:01:1520/461Beat 96%
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Heerenveen9 May 2025Individual Open · Men1:20:07415/1217Beat 66%