WBC Featherweight Champion Gary Russell Jr. (28-1, 17 KOs) and undefeated challenger former Olympian Joseph Diaz (26-0, 14 KOs) underwent an official weigh-in procedure on the eve of their May 19 fight in Oxon Hill, Maryland, at MGM National Harbor arena, which is located just a few miles from the champion's home. Russell Jr.'s weight was 125.5 pounds, Jo Jo was 126 pounds.