Progress against the field
Between Boston 2025 and Boston 2026, Andrea Davis and Kerri Costa lost 3:24 to the field.
The clock says 0:31 faster, but the races themselves got 3:55 quicker for everyone.
The longest gap between two races compared here, 244 days between Boston 2025 and New York 2026, cost 3:54 on 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 · 4 events
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Boston8 Oct 2026Relay · Mixed1:10:4019/85Beat 78%
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Boston8 Oct 2026Doubles Open · Women1:23:26 PB177/742Beat 76%
↑ 133 days after New York 2026, with Kerri Costa 0:30 better than the field Why ↓Close ↑
4:53 faster on the clock, and the race was 4:23 faster for everyone, so 0:30 of it was this pair.
The fieldCompare these two →4:23 faster This pair4:53 faster -
New York28 May 2026Doubles Open · Women1:28:19135/399Beat 66%
↑ 244 days after Boston 2025, with Kerri Costa 3:54 worse than the field Why ↓Close ↑
4:22 slower on the clock in a race that was 0:28 slower for everyone: 3:54 lost to the field.
The fieldCompare these two →0:28 slower This pair4:22 slower -
Atlanta31 Oct 2025Doubles Open · Women1:43:42460/596Beat 23%
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Boston26 Sep 2025Doubles Open · Women1:23:57527/1424Beat 63%