Here's how I see it...

Edwin Valero-Antonio Pitalua = Valero
Michael Katsidis-Jesus Chavez = Kats
Jorge Barrios-Carlos Hernandez = Barrios
Joel Casamayor-Julio Diaz = Casa

Valero - Casa = Valero
Kats - Barrios = Kats

Valero - Kats = Valero

Valero - JMM = JMM