Progress against the field
From New York 2026 to Boston 2026, the field gained 3:56 on Rachel DiFronzo and Michael Nolan.
The clock says 1:47 slower, but the races themselves got 2:09 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 Doubles Open · Mixed, with Michael Nolan, the one raced most; every comparison is in the list below.
Every race
5 races · 3 events
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Boston8 Oct 2026Doubles Open · Mixed1:13:0949/373Beat 87%
↑ 133 days after New York 2026, with Michael Nolan 3:56 worse than the field Why ↓Close ↑
1:47 slower on the clock in a race that was 2:09 faster for everyone: 3:56 lost to the field.
The fieldCompare these two →2:09 faster This pair1:47 slower -
Boston8 Oct 2026Doubles Open · Women1:18:43 PB106/691Beat 85%
↑ 377 days after Boston 2025, with Marisa DiFonzo 1:55 better than the field Why ↓Close ↑
1:55 better than the field: 4:03 faster on the clock, against 2:08 faster for everyone.
The fieldCompare these two →2:08 faster This pair4:03 faster -
New York28 May 2026Doubles Open · Mixed1:11:22 PB70/602Beat 88%
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Boston26 Sep 2025Doubles Open · Women1:22:46479/1424Beat 66%
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Boston26 Sep 2025Individual Open · Women1:27:56 PB409/1290Beat 68%