Progress against the field
John Buttermore has gained 1:39 on the field from Chicago 2022 to Chicago 2025.
Over the same races everyone got 6:02 quicker, so 7:41 faster on the clock looks better than it was.
The largest gain on the field came from Chicago 2022 → Chicago 2023: 2:24 in 371 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
5 races · 4 events
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Shanghai16 May 2026Doubles Open · Mixed1:15:37 PB123/694Beat 82%
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Shanghai16 May 2026Individual Open · Men1:14:0977/1447Beat 95%
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Chicago14 Nov 2025Individual Open · Men1:11:0589/1621Beat 95%
↑ 734 days after Chicago 2023 0:45 worse than the field Why ↓Close ↑
0:45 behind the field: 1:05 slower on the clock, against 0:20 slower for everyone.
The fieldCompare these two →0:20 slower This athlete1:05 slower -
Chicago11 Nov 2023Individual Open · Men1:10:00 PB36/469Beat 92%
↑ 371 days after Chicago 2022 2:24 better than the field Why ↓Close ↑
8:46 faster on the clock, and the race was 6:22 faster for everyone, so 2:24 of it was this athlete.
The fieldCompare these two →6:22 faster This athlete8:46 faster -
Chicago5 Nov 2022Individual Open · Men1:18:4637/233Beat 84%