William Kaptein

William Kaptein is a South Africa long-distance runner, born on June 12, 1992. He competes primarily in the 3000m, 5000m and Semi.

His personal bests include 9:02.67 in the 3000m, 14:39.69 in the 5000m, 1:03:21 in the Semi, 28:34 in the 10Kilometr and 35:52 in the 12Kilometr. He is currently active on the international athletics circuit, representing South Africa.