David Barmasai Tumo

David Barmasai tumors (* 1989) is a Kenyan marathon runner.

Tumors won the 2009 Eldoret Marathon at 2100 m elevation in 2:16:00 h The following year he won, also in altitude, the Nairobi Marathon and increased its Best known in 2:10:31 h International, he was, however, until 2011 by his winning the Dubai Marathon in 2:07:18 h It was his first race outside Kenya.

At the World Athletics Championships 2011 in Daegu, he was in 2:11:39 h fifth.