Pablo Barrientos is a professional footballer from Argentina. A midfielder, Barrientos began his career at San Lorenzo, in 2003. He played for San Lorenzo until 2006 and then moved to Russia, joining FC Moscow for a three-season deal. With just 33 appearances in all competitions, he returned to San Lorenzo in 2008 and has scored 5 goals in his first 14 appearances.
Barrientos was a member of the Under-20 national squad in 2004 and scored 6 goals for the team, in just 15 appearances.