#5 Alberto "Dos Caras Jr." Rodriguez (Alberto Del Rio) (9-5)
Although technically trained in professional wrestling first, Jose Alberto Rodriquez (also known as Dos Caras Jr, Alberto Del Rio and Alberto El Patron) began his MMA career roughly around the same time at the turn of the century, having already spent his younger days as an internationally-successful amateur wrestler.
In his amateur wrestling days, Del Rio competed in the Czech Republic, won a medal at the Pan American Games and was set to compete in the 2000 Summer Olympics in Sydney if not for lack of funding and support for amateur wrestling from Mexican authorities.
As a legitimate grappler and pro wrestler who came from a family of luchadors, Del Rio wore a mask in MMA and managed to amass a respectable 9-5 MMA record at various small promotions in Latin America and Japan, before signing with WWE developmental promotion FCW in 2009.
He is best known as a former WWE Champion and World Heavyweight Champion and has also done stints in AAA, Impact Wrestling and Lucha Underground.