Progress against the field
Between Los Angeles 2023 and Phoenix 2026, Mark Dietzel pulled 5:48 ahead of the field.
Over the same races everyone got 10:17 quicker, so 16:05 faster on the clock looks better than it was.
The field was beaten in 3 of 4 comparisons.
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
5 races · 5 events
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Phoenix29 Jan 2026Individual Open · Men1:24:51421/947Beat 56%
↑ 48 days after Anaheim 2025 6:12 worse than the field Why ↓Close ↑
6:12 behind the field: 1:37 slower on the clock, against 4:35 faster for everyone.
The fieldCompare these two →4:35 faster This athlete1:37 slower -
Anaheim12 Dec 2025Individual Open · Men1:23:14 PB382/1835Beat 79%
↑ 370 days after Anaheim 2024 9:36 better than the field Why ↓Close ↑
12:49 faster on the clock, and the race was 3:13 faster for everyone, so 9:36 of it was this athlete.
The fieldCompare these two →3:13 faster This athlete12:49 faster -
Anaheim7 Dec 2024Individual Open · Men1:36:03304/607Beat 50%
↑ 202 days after Gainful Anaheim 2024 2:02 better than the field Why ↓Close ↑
2:02 better than the field: 3:15 faster on the clock, against 1:13 faster for everyone.
The fieldCompare these two →1:13 faster This athlete3:15 faster -
Gainful Anaheim19 May 2024Individual Open · Men1:39:18413/623Beat 34%
↑ 155 days after Los Angeles 2023 0:22 better than the field Why ↓Close ↑
1:38 faster on the clock, and the race was 1:16 faster for everyone, so 0:22 of it was this athlete.
The fieldCompare these two →1:16 faster This athlete1:38 faster -
Los Angeles16 Dec 2023Individual Open · Men1:40:56287/404Beat 29%