Los Angeles, Ca.  ---   Former Jr. Welterweight champion Mike Alvarado of Denver,Co works out in Los Angeles for his upcoming 12-round welterweight battle against four-division world champion Juan Manuel Marquez of Mexico.   Promoted by Top Rank® in association with Zanfer Promotions, Márquez Boxing and Tecate, Márquez and Alvarado will collide at The Forum in Inglewood,Ca. on Saturday, May 17 and will be televised live on HBO®.  --- Photos by Chris Farina/Top Rank.