Progress against the field
Between Boston 2025 and Dallas 2025, Casey Shields pulled 10:39 ahead of the field.
The clock says 11:42 faster, but the races themselves got 1:03 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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Dallas21 Nov 2025Individual Open · Men1:38:22 PB1385/2078Beat 33%
↑ 56 days after Boston 2025 10:39 better than the field Why ↓Close ↑
10:39 better than the field: 11:42 faster on the clock, against 1:03 faster for everyone.
The fieldCompare these two →1:03 faster This athlete11:42 faster -
Boston26 Sep 2025Individual Open · Men1:50:041228/1463Beat 16%