PITTSBURGH — Marco Gonzales allowed six hits in seven innings, Austin Nola and Omar Narvaez hit back-to-back home runs and the Seattle Mariners beat Pittsburgh 6-0 on Tuesday night.

Gonzales (16-11) struck out four, walked none and doubled and scored in the fifth inning. The left-hander has set career high in wins, starts (32) and innings pitched (189).

Sam Tuivailala and Reggie McClain each pitched one inning to complete the eight-hitter.

Rookie Mitch Keller (1-5) gave up two runs in five innings in falling to 0-4 in his last six starts. The Pirates’ Jose Osuna and Erik Gonzalez each had two hits.

Dee Gordon opened the scoring with a second-inning sacrifice fly and Gonzales scored on J.P. Crawford’s single to make it 2-0. Narvaez drove in the last run with a single in the seventh.

Workers removed a banner depicting Felipe Vazquez from outside PNC Park after he was arrested prior to the Pirates losing their fourth game in a row. Team president Frank Coonelly, general manager Neal Huntington and manager Clint Hurdle addressed the players in a pregame meeting and there was a somber mood in the clubhouse afterward.

Vazquez’s arrest came eight days after he and fellow reliever Kyle Crick got into a clubhouse fistfight at San Francisco and were fined.