He clocked 10.07s in the race won by Australian Kennedy Lachlan in 9.98s.
The race was won in style by Olympian Lilian Odira, who posted a commanding 1:58.31.
Yego managed a season-best throw of 78.74m to settle for fifth position.
They begin the run-in with a tricky encounter against Kibera Black Stars on Sunday.
The Lionesses have painful memories from last year's performance in Madagascar, where they finished third.
Organisers have billed the women's steeplechase lineup as one of the most electrifying races on the programme.
The Kenyan behemoths will be flexing muscles in the 97th edition of the nation's most cherished football showpiece.
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