CINCINNATI (AP) – Tyler Naquin hit another leadoff home run and the high-scoring Cincinnati Reds kept rolling, backing Luis Castillo to rout the Pittsburgh Pirates 11-4 Wednesday for their fifth straight win.

The Reds have started a season 5-1 for the first time since 2016. They outscored the Pirates 30-8 in the three-game series sweep.

Their 56 runs are the most in Reds franchise history through the first six games of a season. The 1976 Big Red Machine with Joe Morgan, Pete Rose, Johnny Bench and Tony Perez scored 51 en route to a second straight championship.

Naquin jumped on Chad Kuhl’s first pitch for his second career leadoff home run, and second in as many days. He became the first Reds batter with leadoff home runs in consecutive appearances since Eddie Milner on June 24-25, 1984.

A day after hitting two homers and driving in seven runs, Naquin started the Reds toward another romp by keying a five-run first inning.

Nick Castellanos homered in the fifth. Tyler Stephenson and Aristides Aquino hit back-to-back home runs in the eighth.

Jonathan India drove in three runs for the Reds, giving him 10 RBIs in his first six career games. The rookie second baseman also threw out a runner at the plate.

Castillo (1-1) neatly bounced back after allowing a career-high 10 runs on opening day to St. Louis. He shut out the Pirates on four hits for seven innings, striking out five and walking one.

Erik Gonzalez hit his first career grand slam in the Pirates ninth off Amir Garrett.