Twenty-five light tosses from 90 feet is a long way from playing right field in the major leagues, but for Carlos Beltran it was a start. Before Wednesday night’s game against the Mariners at Safeco Field, Beltran performed that exercise and said his right elbow, which has a bone spur, felt good. “I’ll keep throwing and continue to add more throws and longer,’’ Beltran said of the next step. Asked when the elbow will be strong enough to play right field for the first time since May 12, Beltran was in the dark. “I have no idea. I have been out of throwing for a month. It’s going to take time,’’ Beltran said. Beltran wore the brace he has been using at the plate and it didn’t hinder his throwing. “I don’t think it’s a big difference,’’ said Beltran, who was the designated hitter for the sixth straight game Wednesday night, going 0-for-4 in the Yankees’ 4-2 win. He was coming off a two-hit game Tuesday when he drove in his second run since coming off the disabled list. After Tuesday night’s game, Beltran said he can still feel discomfort in the elbow, which put him on the DL from May 13-June 5 and has been treated with oral medications and cortisone shots.