Progress against the field
Between Boston 2025 and Boston 2026, Dylon Grzenda lost 4:55 to the field.
The clock says 2:05 slower, 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. The summary above covers Individual Open · Men, the one raced most; every comparison is in the list below.
Every race
6 races · 4 events
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Boston8 Oct 2026Doubles Open · Mixed1:15:17 PB247/1096Beat 78%
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Boston8 Oct 2026Individual Open · Men1:16:1142/418Beat 90%
↑ 377 days after Boston 2025 4:55 worse than the field Why ↓Close ↑
4:55 behind the field: 2:05 slower on the clock, against 2:50 faster for everyone.
The fieldCompare these two →2:50 faster This athlete2:05 slower -
New York28 May 2026Doubles Open · Men1:05:5525/365Beat 93%
↑ 244 days after Boston 2025, with Renadi Durosier 2:32 worse than the field Why ↓Close ↑
2:12 slower on the clock in a race that was 0:20 faster for everyone: 2:32 lost to the field.
The fieldCompare these two →0:20 faster This pair2:12 slower -
Phoenix29 Jan 2026Doubles Pro · Men1:12:56 PB162/246Beat 34%
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Boston26 Sep 2025Doubles Open · Men1:03:43 PB51/734Beat 93%
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Boston26 Sep 2025Individual Open · Men1:14:06 PB182/1463Beat 88%