DAGENHAM, England (AP) _ Colin McMillan, Britain, stopped Tommy Valdez, Mexico, 6, featherweights; Maurizio Stecca, Italy, stopped Roy Muniz, Denver, 6, featherweights.

LONDON (AP) - Duke McKenzie, Britain, stopped Wilfredo Vargas, Puerto Rico, 8, to retain WBO bantamweight title.

SAN DIEGO (AP) - Orlin Norris, 189, Campo, Calif., stopped Anthony Hembrick, 190, Detroit, 2:40 of the eighth round, to retain NABF cruiserweight championship; Engels Pedroza, Las Vegas, stopped Alberto Castro, Mexico, 37 seconds of third round, welterweights.