The service, available on mlb.com, is provided by Seattle-based RealNetworks Inc. and will cost $79.95 for the season, $14.95 a month or $2.95 a game.
Commented Bob Bowman, chief executive of MLB Advanced Media: "Each new medium - from print to radio to TV to cable TV to satellite TV - has contributed to the promotion and expansion of baseball around the world. We expect this new product will have the same effect."
Major League Baseball offered its first live webcast of an entire game last August - a free showing of the New York Yankees against the Texas Rangers. The offering was taken up by about 30,000 MLB fans.
This season, 45 games will be shown each week. The schedule will be posted on MLB.com before the start of the regular season on March 25. Major League Baseball also will show nine exhibition games for free, beginning March 13 with the Yankees against the Boston Red Sox.
However, subscribers won't be allowed to watch their hometown teams on the internet as MLB doesn't want to interfere with local TV broadcasts. As way of a compromise, subscribers will be able to watch their local teams 90 minutes after their games end.
