The San Francisco Giants face off against the St Louis Cardinals in game four of the NMLCS at 8:00PM today. The Cardinals captured the first game of the series, the Giants took the second, then the Cards took the third. At home tonight, the Cardinals will look to move within one win of a trip to the World Series. Their road tonight won’t be easy, however, as they’ll have to get through Giants ace Tim Lincecum. Wainwright, meanwhile, will start for the Cardinals. If you can’t watch the NLCS on TV, you can always live stream Giants v Cardinals online. Here’s how.

How to Watch the MLB Playoffs Online

In order to catch the MLB playoffs online you’ll have to sign up for Postseason.tv since it’s only online network officially licensed with the MLB to offer postseason coverage. The postseason deal costs $4.99.

With Postseason.tv you can watch up to four alternate angles of any game with full broadcast audio. You’ll be able to choose from up to 10 different fixed angles, you can access the pitch by pitch widget and read streaming Tweets via Twitter. If you’re REALLY pumped for a game you can watch live batting practice before the first pitch.

Postseason.tv playoff action is accessible on your mobile device or computer but, unlike regular MLB.tv, you  can’t watch it on your Xbox 360, PS3, or Apple TV.

If you’re interested, you can sign up here.

If Postseason.tv isn’t your thing, TBS is covering the MLB playoffs through TBS Hot Corner. While Hot Corner doesn’t show live streams of games, it has exclusive interviews, along with analysis from players, coaches, and pundits.

Here’s some info:

“This year’s media player allows fans more interactivity as they’ll be able to choose between a Backstop Cam, Pitcher Cam, Dugout Cam and Batter Cam.

“…fans will have the option to switch between live games, interact with other fans around the country in live chat rooms and vote in live polls. An on-site reporter will bring fans live reports and exclusive interviews throughout the game as well.

“The Hot Corner also offers exclusive on-demand postseason content featuring on-field postgame reactions from players and managers, sit-down player interviews, original postseason-themed music videos featuring rock ‘n’ roll legends Bon Jovi and a behind-the-scenes look into players’ pregame and off-day routines.”

For TBS Hot Corner, head here.