Progress against the field
Between Chicago 2025 and New York 2026, Rosalyn Cosme kept pace with the field.
Over the same races everyone got 2:41 slower, so 2:29 slower on the clock looks worse 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.
Every race
6 races · 6 events
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New York28 May 2026Individual Pro · Women1:28:3171/182Beat 61%
↑ 195 days after Chicago 2025 0:12 better than the field Slower on the clock, ahead of the field Why ↓Close ↑
2:29 slower on the clock, but the race was 2:41 slower for everyone, so this was 0:12 better than the field.
The fieldCompare these two →2:41 slower This athlete2:29 slower -
Chicago14 Nov 2025Individual Pro · Women1:26:02 PB108/194Beat 44%
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New York30 May 2025Doubles Open · Mixed1:13:0026/143Beat 82%
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Chicago Navy Pier16 Nov 2024Individual Open · Women1:23:36 PB143/599Beat 76%
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New York1 Jun 2024Doubles Open · Women1:19:49 PB67/436Beat 85%
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Washington D.C. Open North American ChampionshipsDate unknownDoubles Open · Mixed1:12:53 PB123/761Beat 84%