Progress against the field
From Chicago 2020 to Chicago 2021, ZACH GRUENWALD got 0:50 faster than the field.
The clock says 0:50 slower, but the races themselves got 1:40 slower 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
4 races · 4 events
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Chicago14 Nov 2025Doubles Open · Mixed1:35:37 PB927/1179Beat 21%
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Chicago5 Nov 2022Individual Pro · Men1:33:49 PB52/70Beat 26%
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Chicago26 Jun 2021Individual Pro · Men1:47:2226/40Beat 35%
↑ 518 days after Chicago 2020 0:50 better than the field Slower on the clock, ahead of the field Why ↓Close ↑
0:50 slower on the clock in a race that was 1:40 slower for everyone: 0:50 gained on the field, which the clock hides.
The fieldCompare these two →1:40 slower This athlete0:50 slower -
Chicago25 Jan 2020Individual Pro · Men1:46:3272/83Beat 13%