Michael McLoone-USA TODAY Sports

Nolan Arenado hit his 300th career home run and Jordan Montgomery allowed three hits over seven scoreless innings to propel the visiting St. Louis Cardinals to a 6-0 victory at Milwaukee on Saturday night, snapping the Brewers' six-game winning streak.

Arenado's two-run shot, his first of the season, triggered a four-run third inning that put the Cardinals up 6-0. Paul Goldschmidt opened the frame with a double and Arenado then extended his hitting streak to eight games, sending a 1-0 changeup 394 feet to left.

Montgomery (2-0) struck out nine and walked two for the Cardinals' first quality start of the season.

The Brewers loaded the bases with two outs in the eighth against Zack Thompson, but he fanned Luke Voit to end the threat. Drew VerHagen finished with a perfect ninth.

Brewers starter Eric Lauer (1-1) was tagged for six runs on seven hits in four innings, striking out four and walking three in a 93-pitch outing.

Rookie Jordan Walker, who also has hit safely in all eight games, hit his second homer of the season in the third, a two-run shot to left.

Montgomery retired the first seven hitters before rookie Joey Wiemer's one-out double to right in the bottom half of the third. The Brewers loaded the bases on a single and walk, but Montgomery got Christian Yelich on an inning-ending bouncer to second.

The Cardinals took a 2-0 lead in the first. Tommy Edman led off the game by beating out an infield single. He advanced on Dylan Carlson's single, took third on Goldschmidt's fly to right and came home on Arenado's sacrifice fly to center. Willson Contreras' bloop single to shallow right scored Carlson.

Arenado just missed a home run earlier in his first at-bat when his drive with two aboard curved just outside the left field foul pole.

More must-reads:

TODAY'S BEST
Three takeaways as Rangers take commanding 3-0 series lead on Hurricanes
Cavaliers punch back, blowing out Celtics in Game 2
Coach: Oilers star center could miss Game 2 vs. Canucks
Watch: Cavaliers' Evan Mobley turns defense into offense in Game 2 vs. Celtics
Xander Schauffele tops stacked leaderboard after first round of Wells Fargo Championship
Rangers center making long-awaited return in Game 3 vs. Hurricanes
Suns talks with head-coaching target 'expected to move quickly'
Knicks get even more bad injury news ahead of Game 3
Frank Vogel fell victim to a Suns ownership group eager to win
2008 Celtics champion sentenced to prison despite emotional plea
Skip Bayless makes huge Tom Brady prediction after Netflix roast
14-year-old phenom signs unprecedented MLS deal that includes future Man City transfer
Pacers coach claims officials are biased against 'small market' teams
Hall of Famer makes bold prediction about Russell Wilson, Steelers
49ers Hall of Fame CB Jimmy Johnson dies
Rams make surprising move with former team captain
NBA announces discipline for Bucks' Patrick Beverley
Hall of Fame RB defends Najee Harris after Steelers decline fifth-year option
Pacers file shocking number of questionable calls after Game 2 loss vs. Knicks
Former NBA star says Anthony Edwards becomes face of the NBA if Wolves knock off Nuggets