Progress against the field
Jim Sronkoski has gained 9:29 on the field from Chicago - North American Open Championship 2023 to Chicago 2025.
The clock says 12:27 faster, but the races themselves got 2:58 quicker for everyone.
The largest gain on the field came from Chicago - North American Open Championship 2023 → Chicago 2023: 9:59 in 273 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
3 races · 3 events
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Chicago14 Nov 2025Individual Open · Men1:29:16720/1621Beat 56%
↑ 734 days after Chicago 2023 0:30 worse than the field Why ↓Close ↑
0:50 slower on the clock in a race that was 0:20 slower for everyone: 0:30 lost to the field.
The fieldCompare these two →0:20 slower This athlete0:50 slower -
Chicago11 Nov 2023Individual Open · Men1:28:26 PB225/469Beat 52%
↑ 273 days after Chicago - North American Open Championship 2023 9:59 better than the field Why ↓Close ↑
13:17 faster on the clock, and the race was 3:18 faster for everyone, so 9:59 of it was this athlete.
The fieldCompare these two →3:18 faster This athlete13:17 faster -
Chicago - North American Open Championship11 Feb 2023Individual Open · Men1:41:43256/354Beat 28%