Gennady Golovkin brings his show to Carson, facing Marco Antonio Rubio

Gennady Golovkin’s West Coast coming-out party takes place Saturday night at the StubHub Center in Carson.

The fast-rising middleweight from Kazakhstan will take on Marco Antonio Rubio of Mexico, in a fight that had title implications in the WBC, WBA and IBO before Rubio weighed in at 161.8 pounds, above the 160-pound middleweight limit.

Now, his interim WBC title has been declared vacant, and if Rubio wins, Golovkin’s title also will be vacant.

Those 1.8 pounds also cost Rubio a purse reduction from $450,000 to $350,000. Golovkin, who weighed in at 159, will earn a base purse of $900,000.

Golovkin, 32, has risen to boxing’s forefront with a recent string of knockout wins. He is 30-0 with 27 knockouts and his current biggest problem is not so much the opponents in the ring as the number of potential opponents not interested in fighting him.

Rubio, 34, has a record of 59-6-1, with 51 knockouts.

Golovkin lives in Germany and has fought mostly in Europe, or on the East Coast of the U.S. But he said recently he is hoping to buy a home in Southern California, fight four times a year for the next four years and make sure many of those bouts are either at Staples Center or in Las Vegas.

The semi-main event will be a WBA featherweight title fight between champion Nonito Donaire and Nicholas Walters. Donaire is 33-2, with 21 knockouts, Walters 24-0, with 20 KOs.