Baseball fans love a matchup with a convoluted, friends-turned-bitter-enemies backstory, so here’s one with more twists than an episode of “Family Feud.”

In the admittedly iffy case that the Seattle Mariners and the Milwaukee Brewers get to the World Series, it could well be the first Fall Classic with two teams from the same lawsuit.

The Brewers, who are now down 3-0 in the National League Championship Series against the Los Angeles Dodgers, started in Milwaukee in 1970.

But a year before that, they’d been the Seattle Pilots, a car-wreck of an expansion club that played a single season in Seattle before decamping in a cloud of acrimony and recrimination.

After Washington state sued the American League for engineering the departure, league officials offered Seattle a brand-new team, wh

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