St Mary's Yala players warm up.[Washington Onyango,Standard]
Murunda Innocent, Joseph Onyango, Angelo Makori and Henry Oduor all crossed the white wash for Yala who will be hunting for a semis spot ahead of their second match against pool leaders Chianda High School on Friday.
Chianda sit top of Group A after a 32-0 win over Sirembe. In Group B, Ambira whitewashed Barding 19-0 while Sawagongo labored to edge out Ugenya 12-10.
In rugby girls, Sidindi saw off Bondo Township 15-0 while Nyamira Girls ran over Mbaga Girls 27-0.
In football boys, Yala defeated Sirembee 2-0 to begin their Group B preliminaries on a high and top the pool as Nyabera and Nyang'oma drew 0-0.
In Group A, 2016 East African champions Brading were held to a 0-0 draw by Ambira High School while Majengo beat Humwend 1-0 to top the pool.
In the girl's category, Sinaga edged off Sigomre 3-2 in another five set thriller while Nyakongo edged out Ng'iya Girls 3-0 in Group A.
Sega Girls lost 3-0 to Aluor Girls as Ndwara defeated Nyamira Girls 3-0.
In basketball 3x3, Ng'iya Girls saw off Nyagondo 21-8.
In netball, Obambo Girls saw off Sigomre 25-14, Kandaria defeating Humwend 27-8, Barchando whipped by Wagai 35-17 and Ambrose Adeya Adongo defeating Nyawara 16-14.