Progress against the field
Between Chicago - North American Open Championship 2023 and Chicago 2025, Ruben Velasco pulled 20:35 ahead of the field.
The clock says 25:47 faster, but the races themselves got 5:12 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
2 races · 2 events
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Chicago14 Nov 2025Individual Open · Men1:29:28 PB730/1621Beat 55%
↑ 1007 days after Chicago - North American Open Championship 2023 20:35 better than the field Why ↓Close ↑
20:35 better than the field: 25:47 faster on the clock, against 5:12 faster for everyone.
The fieldCompare these two →5:12 faster This athlete25:47 faster -
Chicago - North American Open Championship11 Feb 2023Individual Open · Men1:55:15315/354Beat 11%