[7] While still attending high school in Rainier, Washington after moving there with his family, Pérez began boxing professionally under the management of Jim Douglas.
[5][8] He often fought in matches at the local Lucky Eagle Casino in Rochester; his first six-round bout took place the same weekend that he graduated high school.
[11] On September 12, 2009, Pérez won the WBO NABO super featherweight title by unanimous decision, beating the previously undefeated Dannie Williams in the tenth round at a match at the Playboy Mansion.
[14] As both were talented, undefeated boxers, there was speculation as to how the match would turn out, with William Holmes describing Pérez's history:[15] "Eloy Perez, a California native, has yet to fight any fighters with a recognizable name.
While Perez has yet to fight someone that the average boxing fan would have heard of, he has consistently fought competition with winning records, and Saturday may be his chance to shine.