Walter Gael Sandoval Contreras (born 5 November 1995) is a Mexican professional footballer who plays for Leones Negros in the Liga de Expansión MX.

Sandoval played for many academies in the state of his native Jalisco, starting with Club Oro in 2010 and then settled with Estudiantes Tecos, until they were dissolved in 2012.

[3] In the summer of 2015, Sandoval joined Juárez on a one-year loan in the Ascenso MX, to gain professional playing experience.

In December 2021, Sandoval joined New Zealand A-League club Wellington Phoenix on loan until the end of the season.

[14] On 27 July 2023, returned to Mexico to join his hometown club Leones Negros in Liga de Expansión MX.