Gennady Golovkin's 17-fight knockout streak will have some power-punching company Oct. 18 at StubHub Center in Carson.
Fight promoter Tom Loeffler said middleweight world champion Golovkin's bid to become the first man in 10 years to knock down challenger Marco Antonio Rubio will be accompanied by a co-main event for the World Boxing Assn. featherweight title between Nonito Donaire and Jamaica's Nicholas Walters.
Walters (24-0, 20 knockouts) has won four consecutive fights by early stoppage, most recently decking veteran Vic Darchinyan three times in a May title defense in Macao, China.
Donaire (33-2, 21 KOs) has responded from an April 2013 unanimous-decision loss to Cuba's Guillermo Rigondeaux by scoring a ninth-round technical knockout of Darchinyan in November, and then beating Simpiwe Vetyeka by technical draw after dropping Vetyeka in the fourth round.
Donaire has held either a primary or interim world title belt in five divisions and he won two fights in Carson in 2012.
Golovkin (30-0, 27 KOs) has the most lofty knockout rate (90%) among all world champions. He trains in Big Bear.