Yankees-Red Sox feels mean again because both dugouts need it
Boston and New York have stopped treating the rivalry like nostalgia and started using it like leverage.
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Dodgers-Padres have found the perfect October hate cycle
Los Angeles and San Diego now play like two clubs that no longer need a postseason prompt to remember the score.
Mets-Braves keep punishing any team that blinks first
Atlanta and New York have built a divisional feud around pressure tolerance more than aesthetics.
Orioles-Blue Jays keep building the division race that refuses to relax
Baltimore and Toronto do not have the oldest feud in baseball, but they might have the most impatient one right now.
Astros-Rangers turned a division race into a contact sport
The rivalry has enough history to matter and enough recent heat to keep every pitch feeling louder than it should.