Shawn Porter made weight on his first try Friday for his 147-pound title unification fight against Errol Spence Jr. Porter weighed exactly 147 pounds when he got on the California State Athletic Commission’s scale at the Intercontinental Los Angeles Downtown hotel.

Spence stepped on the CSAC’s scale at 147 pounds, too, for their 12-rounder Saturday night at Staples Center.

WBC super middleweight champion Anthony Dirrell and former WBC champ David Benavidez met their contractual obligations for their 12-round, 168-pound title bout on the Spence-Porter undercard.

The 34-year-old Dirrell (33-1-1, 24 KOs), of Flint, Michigan, came in at 167½ pounds. The 22-year-old Benavidez (21-0, 18 KOs), a Seattle resident raised in Phoenix, also officially weighed 167½ pounds.

Mario Barrios (24-0, 16 KOs), San Antonio, 140 pounds, vs. Batyr Akhmedov (7-0, 6 KOs), Belogorsk, Russia, 139¼ pounds, 12 rounds, for the vacant WBA world super lightweight title.

Josesito Lopez (36-8, 19 KOs), Riverside, California, 146½ pounds, vs. John Molina Jr. (30-8, 24 KOs), Covina, California, 146¼ pounds, 10 rounds, welterweights.