Divisional rivalries, potential playoff previews and even a World Series rematch will be at the center of baseball out of the All-Star break -- and watching these matchups will be as accessible as ever.

MLB.TV will be offering its annual second-half free preview starting today, with each game available to stream with a free MLB.com account. And the excitement is certainly not lacking.

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The Nationals will visit the Phillies, with the former having gone on a torrid stretch since late May to go a half-game up on Philadelphia for the top National League Wild Card spot. The Pirates, meanwhile, visit the Cubs in an NL Central where first-place Chicago holds just a 4 1/2-game lead over the last-place Reds. And the surprise team of the year, the Twins, head to Cleveland with a 5 1/2-game first-place cushion, looking to stave off the Indians' bid to claw back into the American League Central race.

If that isn't enough, last year’s paragons -- the Dodgers and Red Sox -- will meet at Fenway Park for three games for the first time since Boston was crowned World Series champion.

Each game this weekend will be available to watch or listen to on every supported device and platform. Regular blackout restrictions apply to all games.