Progress against the field
Between New York 2024 and Boston 2026, michael sclafani lost 3:02 to the field.
Over the same races everyone got 18:25 quicker, so 15:23 faster on the clock looks better than it was.
195 days between Chicago 2025 and New York 2026 is the longest gap compared here, and the second race was 5:58 better than 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
8 races · 8 events
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Boston8 Oct 2026Individual Open · Men1:15:33158/1233Beat 87%
↑ 133 days after New York 2026 3:34 worse than the field Why ↓Close ↑
3:34 behind the field: 2:11 slower on the clock, against 1:23 faster for everyone.
The fieldCompare these two →1:23 faster This athlete2:11 slower -
New York28 May 2026Individual Open · Men1:13:22 PB145/1067Beat 86%
↑ 195 days after Chicago 2025 5:58 better than the field Why ↓Close ↑
5:58 better than the field: 10:15 faster on the clock, against 4:17 faster for everyone.
The fieldCompare these two →4:17 faster This athlete10:15 faster -
Chicago14 Nov 2025Individual Open · Men1:23:37484/1621Beat 70%
↑ 49 days after Boston 2025 5:32 worse than the field Why ↓Close ↑
4:18 slower on the clock in a race that was 1:14 faster for everyone: 5:32 lost to the field.
The fieldCompare these two →1:14 faster This athlete4:18 slower -
Boston26 Sep 2025Individual Open · Men1:19:19357/1463Beat 76%
↑ 119 days after New York 2025 3:26 worse than the field Why ↓Close ↑
1:51 slower on the clock in a race that was 1:35 faster for everyone: 3:26 lost to the field.
The fieldCompare these two →1:35 faster This athlete1:51 slower -
New York30 May 2025Individual Open · Men1:17:28377/1462Beat 74%
↑ 188 days after Dallas 2024 0:38 better than the field Why ↓Close ↑
9:46 faster on the clock, and the race was 9:08 faster for everyone, so 0:38 of it was this athlete.
The fieldCompare these two →9:08 faster This athlete9:46 faster -
Dallas23 Nov 2024Individual Open · Men1:27:14383/929Beat 59%
↑ 175 days after New York 2024 2:54 better than the field Why ↓Close ↑
2:54 better than the field: 3:42 faster on the clock, against 0:48 faster for everyone.
The fieldCompare these two →0:48 faster This athlete3:42 faster -
New York1 Jun 2024Individual Open · Men1:30:56469/895Beat 48%
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Washington D.C. Open North American ChampionshipsDate unknownIndividual Open · Men1:24:55625/1544Beat 60%