From 2300 Arena in Philadelphia.
Mario Barrios (19-0, 11 KOs) battles Naim Nelson (13-3, 1KO) in a 10-round super lightweight bout. From Bethlehem, Pa.
Retired boxing great Floyd Mayweather (49-0, 26 KOs) battles UFC star Conor McGregor (21-3, 18KOs).
Andrzej Fonfara vs. Joe Smith Jr. and Juan Carlos Payano vs. Rau'shee Warren. From Chicago.
Jorge Linares (42-3, 27 KOs) takes on Luke Campbell (17-1, 14 KOs) in a 12-round lightweight title bout; from Los Angeles. Also: Antonio Orozco (26-0, 17 KOs) vs. Roberto Ortiz (35-1-2, 26 KOs), super lightweights, 10 rounds.
Garcia takes on Morales for the WBA Super World light welterweight title and WBC light welterweight title. Also: Pablo Cesar Cano vs. Paul Malignaggi, WBA World welterweight title. From New York.