Padres 2, Pirates 1: Eric Stults allowed one run in 6 1/3 innings to earn his first road win in 13 starts as visiting San Diego evened the series at one game apiece.Jedd Gyorko had an RBI single and Yasmani Grandal delivered a sacrifice fly as the Padres snapped Pittsburgh's three-game winning streak. Stults (5-13) struck out six and scattered seven hits to improve to 1-9 away from home and three relievers bridged the gap to Joaquín Benoit, who struck out two in the ninth for his fifth save.Russell Martin had a pair of hits and an RBI single and Josh Harrison, Starling Marte and Jayson Nix added two hits each for the Pirates, who fell 2 1/2 games behind first-place Milwaukee in the National League Central. Francisco Liriano (3-8) had his four-start unbeaten streak halted despite allowing two runs on three hits over seven strong innings.San Diego loaded the bases with no outs in the first on a pair of singles and a hit batsman and Gyorko followed with a single to center to plate the first run, but Liriano minimized the damage to two runs on Grandal's sacrifice fly. The Pirates answered in the bottom of the inning on a leadoff single by Harrison, who stole second and came home on Martin's one-out single.Liriano settled down after allowing the first five batters to reach, retiring the next 18 he faced and giving his team a chance to rally in the eighth against Kevin Quackenbush when Jordy Mercer led off with a single and Martin followed with a double to put runners at second and third. Quackenbush, though, set down the next three batters to escape the jam unscathed.GAME NOTEBOOK: Pirates 3B Harrison extended his hitting streak to 13 games, the longest by a Pirate this season, while Martin ran his string to eight straight games. ... Padres RHP Nick Vincent retired the only batter he faced in the seventh and has allowed only 1 of 28 inherited runners to score this season - the best percentage in the majors. ... Pirates 2B Neil Walker (back) was out of the starting lineup for the fourth straight game but struck out as a pinch hitter in the ninth, while Padres 1B Tommy Medica exited the game in the eighth after he was struck in the back of the head by a pitch, although he was smiling afterward.