Michael Chavis hit a go-ahead grand slam as the Pittsburgh Pirates overcame a three-run, third-inning deficit, and beat the St. Louis Cardinals 9-4 on Sunday for their first win this season.

Chavis made his first start of the season and homered off left-hander Steven Matz, who allowed seven runs and nine hits over three innings in his first start since.

It was the second slam of Chavis’ big league career in 14 at-bats with the bases full. He finished a triple shy of the cycle.

Diego Castillo added three hits for the Pirates.

Nolan Arenado hit a two-run homer in the first for St. Louis

Ke’Bryan Hayes, Kevin Newman and Jake Marisnick also had RBIs for the Pirates, who scored eight unanswered runs after falling behind 3-0 in the first.

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The finale of the four-game series is today. Pittsburgh is scheduled to statt Zach Thompson and the Redbirds Dakota Hudson. Game time is 1:15 at Busch Stadium.