SAN DIEGO - Francisco Liriano struck out a season-high 13 and Pedro Alvarez hit his NL-leading 31st home run to lead the Pittsburgh Pirates to a 3-1 victory against the San Diego Padres on Monday night.
The Pirates, who had lost seven of nine coming in, maintained a one-game lead in the NL Central over St. Louis.
The Padres struck out 17 times overall Monday night, giving them 59 in their last five games. They've lost nine of 13.
Liriano (14-5) tied his career-high with his 14th victory. He helped give some relief to the Pirates' bullpen, which was taxed when three of the previous six games went extra innings.
Coming off a four-hit victory at St. Louis in his last start, Liriano held San Diego to four hits in seven innings while walking two.
Liriano's previous season high was 11 strikeouts on June 1 against Cincinnati. His career high is 15.
Tonight: Pittsburgh at San Diego, 10:05 p.m.
Pitching matchups: Pirates RHP?A.J. Burnett (5-8) vs. Padres RHP?Tyson Ross (3-5)
The Padres loaded the bases with two outs in the fourth before Liriano got Ronny Cedeno to hit into a force.
The Padres had runners in scoring position only two other times against Liriano. Ronny Cedeno hit a leadoff single in the third and advanced on a balk before Liriano struck out the side. Denorfia doubled to left with one out in the fifth and advanced to third on Will Venable's groundout before Liriano struck out rookie Jedd Gyorko.
In his last four starts after a Bucs' loss, including Monday night, Liriano has pitched 30 innings and allowed only two earned runs.
Mark Melancon pitched the ninth for his eighth save in 10 chances. He allowed Nick Hundley's RBI double with two outs.
Alvarez, who had been tied for the NL lead with Arizona's Paul Goldschmidt, homered on an 0-1 pitch from Andrew Cashner with two outs in the sixth to give the Pirates a 3-0 lead. It landed about six rows behind the Jack Daniel's Old No. 7 party deck that sits atop the right-field wall.
The Pirates scored two runs in the fourth on two singles and an error by right fielder Chris Denorfia. With Andrew McCutcheon aboard on a leadoff single, Alvarez grounded a single to right field, which rolled under the glove of a charging Denorfia and went all the way to the fence, allowing both runners to score.