San Francisco Giants vs St. Louis Cardinals Live Stream Free: Watch Online MLB Opening Game of Series Between National League Contenders at 8:15 PM ET

The San Francisco Giants and the St. Louis Cardinals will battle it out tonight at Busch Stadium in St. Louis, Missouri on Friday, May 31 at 8:15 PM ET. Read on to see where fans can watch and listen to a live stream of this game and catch up-to-date feeds and coverage on highlight plays and scores. 

The San Francisco Giants hope their latest victory will provide some much-needed momentum as they begin a difficult stretch of games.

Returning to the place where they began their undefeated run to the 2012 World Series title, the Giants face the Cardinals on Friday night.

San Francisco (29-25) has lost 10 of 16, but hopes to build on Thursday's 5-2 win over Oakland that prevented a season series sweep at the hands of its Bay Area rival.

Pablo Sandoval delivered a go-ahead two-run single to highlight a four-run sixth for the Giants, who remain confident despite their recent struggles.

"We've been losing some games but the attitude's been good. That's one thing we never lose," center fielder Angel Pagan told the Giants' official website. "We play with a lot of perseverance and determination to go out there and try to get everything better and play hard and believe that things will change."

Perhaps a return to Busch Stadium will help San Francisco start to string together wins yet again.

St. Louis (35-18), however, owns the best record in the majors and outscored the Giants 20-7 while taking two of three at San Francisco in early April. This series begins a stretch of 12 of 14 on the road for the Giants, featuring games against the NL's top teams in the Cardinals, Arizona, Pittsburgh and Atlanta. San Francisco also hosts Toronto for two games during that span.

San Francisco's Matt Cain (4-2, 5.00 ERA) has gone 4-0 with a 3.48 ERA in five starts this month, allowing four runs and six hits in 12 innings to go 1-0 in his last two. He gave up two runs and walked five in five innings of a 7-3 win over Colorado on Sunday.

However, the right-hander is 0-3 with a 7.04 ERA in four starts at St. Louis, including postseason. He allowed nine runs over 3 2/3 innings of a 14-3 home loss to the Cardinals on April 7.