Progress against the field
From Johannesburg 2025 to Johannesburg 2026, Siyabonga Buthelezi has moved with the field: what changed on the clock changed for everyone.
Over the same races everyone got 4:45 quicker, so 4:45 faster on the clock looks better than it was.
The biggest step was Johannesburg 2025 → Cape Town 1 2026: 8:22 on the field in 125 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. The summary above covers Individual Pro · Men, the one raced most; every comparison is in the list below.
Every race
7 races · 6 events
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Cape Town14 Aug 2026Doubles Open · Men1:29:50 PB223/309Beat 28%
↑ 133 days after Cape Town 1 2026, with Siyabulela Mdoda 4:46 better than the field Why ↓Close ↑
9:26 faster on the clock, and the race was 4:40 faster for everyone, so 4:46 of it was this pair.
The fieldCompare these two →4:40 faster This pair9:26 faster -
Johannesburg30 May 2026Individual Pro · Men1:24:1642/131Beat 68%
↑ 57 days after Cape Town 1 2026 8:22 worse than the field Why ↓Close ↑
8:38 slower on the clock in a race that was 0:16 slower for everyone: 8:22 lost to the field.
The fieldCompare these two →0:16 slower This athlete8:38 slower -
Cape Town 13 Apr 2026Doubles Open · Men1:39:16235/291Beat 19%
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Cape Town 13 Apr 2026Individual Pro · Men1:15:38 PB50/191Beat 74%
↑ 125 days after Johannesburg 2025 8:22 better than the field Why ↓Close ↑
8:22 better than the field: 13:23 faster on the clock, against 5:01 faster for everyone.
The fieldCompare these two →5:01 faster This athlete13:23 faster -
Johannesburg29 Nov 2025Individual Pro · Men1:29:0155/112Beat 51%
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Cape Town19 Jul 2025Individual Open · Men1:18:26 PB114/781Beat 85%
↑ 140 days after Johannesburg I 2025 4:38 worse than the field Faster on the clock, behind the field Why ↓Close ↑
6:11 faster on the clock looks better than it was: the race was 10:49 faster for everyone, which leaves this 4:38 behind the field.
The fieldCompare these two →10:49 faster This athlete6:11 faster -
Johannesburg I1 Mar 2025Individual Open · Men1:24:3769/422Beat 84%