Progress against the field
Between New York 2024 and Boston 2025, Michelle Primiceri pulled 21:24 ahead of the field.
Over the same races everyone got 6:31 quicker, so 27:55 faster on the clock looks better than it was.
The longest gap between two races compared here, 314 days between Chicago Navy Pier 2024 and Boston 2025, still ended 9:43 ahead of 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
5 races · 5 events
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Boston26 Sep 2025Individual Open · Women2:07:04 PB1181/1290Beat 8%
↑ 314 days after Chicago Navy Pier 2024 9:43 better than the field Why ↓Close ↑
10:32 faster on the clock, and the race was 0:49 faster for everyone, so 9:43 of it was this athlete.
The fieldCompare these two →0:49 faster This athlete10:32 faster -
New York30 May 2025Doubles Open · Women1:44:02 PB353/417Beat 15%
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Chicago Navy Pier16 Nov 2024Individual Open · Women2:17:36581/599Beat 3%
↑ 168 days after New York 2024 11:41 better than the field Why ↓Close ↑
17:23 faster on the clock, and the race was 5:42 faster for everyone, so 11:41 of it was this athlete.
The fieldCompare these two →5:42 faster This athlete17:23 faster -
New York1 Jun 2024Individual Open · Women2:34:59581/592Beat 2%
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Washington D.C. Open North American ChampionshipsDate unknownDoubles Open · Women1:45:45732/819Beat 11%