Naz was the draw.

Although for the record be beat the WBO, WBC, IBF, WBA/lineal featherweight champions. Guys with "world" titles, and unification matches, certainly bring more to the table than complete unknown mandatories.

As Big H said - Naz retired BEFORE Marquez had even won his first belt (Marquez actually cited his lack of a title as a reason for turning down the Naz fight when offered).

You have to understand that back then Naz was a much bigger draw than even Floyd Mayweather. Floyd's HBO deal paid around a quarter of what Naz was getting ($2m guarantee per fight).