Carlos David Ruiz (born 10 November 1971 in Buenos Aires) is a retired Argentine footballer and now Assistant manager of Arsenal de Sarandí.
Ruiz started his professional career with Racing Club de Avellaneda in 1992, but he never played a league game with the club. The following year 1993 he joined Arsenal de Sarandí, where he played ever since, making him one of the club's longest serving players of all time. One of the highlights of his career was being part of the 2002 Arsenal team that was promoted to the Argentine Primera. During his career Ruiz made 399 appearances for Arsenal, making him the most capped player in the club's history.
On 30 April 2010 Ruiz was named as caretaker coach of Arsenal de Sarandí and replaced Jorge Burruchaga.