Progress against the field
From Chicago 2025 to New York 2026, Sarah O'Reilly got 7:49 faster than the field.
The clock says 7:10 faster, but the races themselves got 0:39 slower for everyone.
The biggest step was Chicago 2025 → Phoenix 2026: 7:38 on the field in 76 days.
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
10 races · 10 events
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Boston8 Oct 2026Doubles Pro · Women1:10:14 PB35/195Beat 82%
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New York28 May 2026Individual Open · Women1:21:3298/1098Beat 91%
↑ 119 days after Phoenix 2026 0:11 better than the field Slower on the clock, ahead of the field Why ↓Close ↑
0:55 slower on the clock, but the race was 1:06 slower for everyone, so this was 0:11 better than the field.
The fieldCompare these two →1:06 slower This athlete0:55 slower -
Phoenix29 Jan 2026Individual Open · Women1:20:37 PB89/550Beat 84%
↑ 76 days after Chicago 2025 7:38 better than the field Why ↓Close ↑
8:05 faster on the clock, and the race was 0:27 faster for everyone, so 7:38 of it was this athlete.
The fieldCompare these two →0:27 faster This athlete8:05 faster -
Chicago14 Nov 2025Individual Open · Women1:28:42415/1127Beat 63%
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Chicago Navy Pier16 Nov 2024Individual Pro · Women1:29:16 PB62/84Beat 26%
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Rimini1 Jun 2024Individual Pro · Women1:30:5219/44Beat 57%
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Washington - North American Championships2 Mar 2024Individual Open · Women1:22:2088/271Beat 68%
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Chicago11 Nov 2023Individual Pro · Women1:34:0139/54Beat 28%
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Los Angeles10 Nov 2022Individual Open · Women1:25:4326/154Beat 83%
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Washington D.C. Open North American ChampionshipsDate unknownDoubles Open · Mixed1:18:28 PB264/761Beat 65%