Jacoby Ellsbury was the latest to preach to the masses that the Yankees are better than what they have shown at the plate. “We have very good hitters, it’s just a matter of time we really square some up,’’ Ellsbury said after his eighth-inning single scored Derek Jeter from second and carried the Yankees to a 3-2 win over the Mariners in front of 28,405 at Safeco Field Tuesday night. On reputation the Yankees hitters are good. Lately, too many of the names don’t match the games. Ellsbury, who stretched his hitting streak to 14 games, is their best hitter in need of a few wingmen in order to take the pressure off the pitching staff. “He is being the player he is capable of being,’’ manager Joe Girardi said. “He could have had three hits as hard as he hit the ball.’’ Ellsbury lined out to center in the first and watched Mariners starter Hisashi Iwakuma make a sensational stab of a liner back to the mound in the third. Two runs in the first off Iwakuma when Jeter singled and scored on Carlos Beltran’s double and Brian McCann drove in Mark Teixeira with an infield single gave the impression the Yankees were about to break out of a funk that smothered them in the previous 10 games when they scored a total of 25 runs. Nevertheless, it wasn’t until the score was tied, 2-2, in the eighth that the Yankees scored again. After Brett Gardner missed a homer to right by a few feet and flied out to the warning track starting the eighth, Jeter bounced a ground-rule double over the center-field fence to bring Ellsbury to the plate.