If the World Series is the primary reason you want to watch live TV, the simplest solution would be to subscribe to YouTube TV or Hulu+ Live TV. Both offer a free trials that will let you watch the games. Then you can cancel when the World Series ends.
An antenna is also another great alternative. This gives you free premium network channels like CBS, ABC, NBC, and Fox in full 1080p HD.
Puffer from Stanford (Online only) is also another way to watch live TV. They have a 500 viewer limit, but you can bypass this by refreshing the page.
USTV is another option for live online TV
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