NEW YORK — Terence Crawford and Felix Diaz both appeared trim and ready for their RING junior welterweight title fight during Friday’s weigh-in at Madison Square Garden.

Crawford (30-0, 21 knockouts), who will be making the second defense of his RING title Saturday, tipped the scales at 139.2 pounds. Diaz weighed in at 139.4 pounds.

This is Diaz’s first bout at his natural weight since 2014, when the Dominican topped contender Adrian Granados. The 2008 Olympic gold medalist found it hard to secure quality fights at 140, so he made the jump to 147 for fights with Lamont Peterson (a controversial decision loss) and Sammy Vasquez (an impressive victory).

“Bud” topped Viktor Postol to claim THE RING title last summer, but Diaz (19-1, 9 KOs) figures to present the toughest challenge of the the 29-year-old’s career. Diaz, 33, is comfortable fighting inside or outside and possesses the pedigree to make proper adjustments mid-fight.

It’s Crawford, though, who is the pound-for-pound athlete (RING No. 5) and overwhelming favorite at about 10-1 odds.

Crawford also will be defending his WBC and WBO 140-pound titles.