Diego Mateo Casas López (born March 4, 1995) is an Uruguayan professional footballer who plays as a forward for Liga Guate club Marquense.
Casas began his career in 2012 with River Plate Montevideo, where he played for three seasons.
In October 2023, following a short spell in Greece with Iraklis Larissa, Casas joined Guatemalan club Cobán Imperial.