Santiago Iglesias Valdez (born 22 May 1993) is an Argentine rugby union footballer who plays as a hooker for Uni Tucumán. Despite only earning two caps for the Argentina national rugby union team (the Pumas) in the Tier 2 rugby tournament, South American Rugby Championship, he was selected by new head coach Daniel Hourcade for the Pumas 2013 end-of-year rugby union tests to Europe to face England, Wales and Italy.