Roy Jones, Jr.
On March 1, 2003, Ruiz was contracted to fight Roy Jones, Jr., who at the time was "The Ring" light heavyweight champion. If Jones was to beat Ruiz in the fight, he would join Bob Fitzsimmons, Michael Spinks, and Michael Moorer as the only three fighters to win titles at light heavyweight and heavyweight as well as becoming the second fighter (Fitzsimmons being the first) to win titles at both middleweight and heavyweight. Ruiz, who said referee Jay Nady "wouldn't let me fight my fight", lost a unanimous decision to Jones and moved back into the WBA's contender pool.