Édgar Alejandro Sosa Medina (born 23 August 1979) is a Mexican professional boxer.

Sosa suffered losses in the early part of his career, the first one came against another future Mexican light flyweight champion Ulises Solís.

On April 14, 2007, Sosa won the WBC Light Flyweight Championship by besting former champion Brian Viloria by unanimous decision.

After the ringside doctor inspected the wound, the referee allowed the fight to continue despite Sosa still being groggy from the injury.

[3] Sosa, who required a metal plate to be implanted on his cheekbone due to multiple fractures, filed a protest with the WBC to have the decision changed to a "no contest".