John Machethe "Mo" Muiruri (born 10 October 1979) is a Kenyan footballer who last played for Moss FK in Norway as a midfielder.
He is one of the most talented midfield quartet of the Kenya National team, Harrambe Stars along with McDonald Mariga, Robert Mambo, Jamal Mohamed and Titus Mulama.
He led Kisii School to two national championships before graduating in 1997.
He appeared at the 2004 African Cup of Nations.
This biographical article related to Kenyan association football is a stub.