Progress against the field
Derek Sacco has dropped 0:39 behind the field from Boston 2025 to Boston 2026.
The clock says 2:11 faster, but the races themselves got 2:50 quicker for everyone.
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
3 races · 3 events
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Boston8 Oct 2026Individual Open · Men1:35:08 PB699/1233Beat 43%
↑ 377 days after Boston 2025 0:39 worse than the field Faster on the clock, behind the field Why ↓Close ↑
2:11 faster on the clock, yet the race was 2:50 faster for everyone, so 0:39 was lost on the field.
The fieldCompare these two →2:50 faster This athlete2:11 faster -
Boston26 Sep 2025Individual Open · Men1:37:19992/1463Beat 32%
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New York14 Dec 2019Individual Pro · Men1:44:05 PB51/70Beat 27%