01What Is Rivalry Week, Anyway?

The short version

Rivalry Week is an MLB programming event that clusters the sport's most storied matchups into a single window on the schedule. The league's official on-field version — Rivalry Weekend, presented by Booking.com — first ran in 2025 and came back for a second edition in 2026. Think of it less as a tournament and more as the league winking at you: yeah, we know you've been waiting all year for this one.

No trophy. No bracket. Just the games everybody circles anyway, bundled together so you can pretend your three-day bender is a "tradition."

Rivalry Week vs. Rivalry Weekend

The two names get used interchangeably, and honestly, that's fine. But if you want the clean version:

• Rivalry Weekend is the official MLB event — a set of interleague and regional series, first staged in May 2025 with 15 matchups (11 interleague, four regional).
• Rivalry Week is the broader label fans and broadcasters use for anything around it: the programming, the throwback uniforms, the "who had it better" arguments that eat up your group chat.

One's a date on the calendar. The other's a mood.

When is it?

Typically May. The 2026 edition ran May 15–17, with 11 interleague series and four regional ones. The exact dates shift year to year, so check MLB's schedule for the current season rather than trusting a blog written in November (hi, that's us — and we're intentionally keeping this page evergreen).

02Why Baseball Rivalries Hit Different

162 games, one long memory

Basketball gives you 82. Football, 17. Baseball gives you 162, and that wrongness is the point. You see the same teams over and over, in different parks, in different weather, with the same grudges stacking up inning by inning for decades.

A rivalry needs repetition. You can't hate somebody you only play twice a year. You can learn to dislike them, sure. But real hatred takes volume — and baseball has the volume to spare.

Geography does the heavy lifting

The best rivalries are usually the closest ones. New York and Boston. Los Angeles and San Francisco. Chicago and St. Louis. Same region, same media market, same fans who went to the same high schools and now have to pick sides at the cookout.

Geography gives you the excuse. History gives you the reason. And about a hundred years of both gives you something you can't manufacture with a marketing campaign.

03The Feuds That Make Rivalry Week

Yankees vs. Red Sox — The Original

If baseball's rivalries were a family tree, this is the couple at the top that everyone's tired of hearing about — and secretly still watches. They first met in 1903. In 1919, the Red Sox sold Babe Ruth to the Yankees, and Boston spent the next 86 years blaming everyone from the front office to a curse with a name: the Curse of the Bambino. The Yankees won 27 World Series. The Red Sox didn't win one until 2004 — when they fell behind 0–3 in the ALCS, won four straight, and made the whole comeback feel like fate settling a very old tab. Show up for this one early. The first pitch is a formality; the booing is the main event.

Dodgers vs. Giants — Coast to Coast

This one started in New York, in the 1880s, with a Brooklyn club and a New York club who apparently decided the five boroughs weren't enough hostility for one city. In 1958, both teams moved west — Dodgers to Los Angeles, Giants to San Francisco — and dragged the feud across the country with them. Same hate, 470 miles of Pacific coastline, better weather.

Cubs vs. Cardinals — The Midwest Grudge

No coastal glamour here. Just two Midwest clubs who've been leaning on each other since 1892 like siblings who live in separate houses but still fight over the same inheritance. St. Louis collected 11 World Series titles. Chicago collected a 108-year drought — 1908 to 2016 — that turned Wrigley Field into a shrine to optimism. When the Cubs finally broke through in 2016, the party wasn't really about the trophy. It was about every fan who'd been told "next year" for nine decades and kept showing up anyway.

The Subway Series & the rest

The Subway Series — Mets vs. Yankees — is the new kid by comparison, but it's the purest version of the geography rule: one city, two uniforms, one train ride between them. They met in the 2000 World Series, and the whole thing felt less like a championship and more like a citywide argument with a first-base dugout.

Honorable mentions that absolutely belong on a Rivalry Week watchlist: White Sox–Cubs (same town, opposite sides), Athletics–Giants (the Bay Area family feud), and Rangers–Astros (Texas, with receipts).

04How to Dress for Rivalry Week

Look, we sell jerseys. We're not going to pretend this section isn't good for us. But the last thing you want at a rivalry game is to look like you're there for the photo op. So here's the honest version of showing up dressed right.

Rep your side, but read the room

Wearing your team's colors to a neutral site? Absolutely. That's the whole fun of it. Wearing them into the other team's park, in their student section, with a loud mouth and a cheap seat? That's how you learn a new definition of "personal space." Pick your spot, know your crowd, and let your jersey do the talking before you do.

Not sure which tier is which? The pick-your-tier guide breaks it down. Everything we carry — every team, every cut, every fit — is collected in the shop rail alongside this article.

The throwback lane

Nothing says "I've been here since the [insert decade]" like a throwback. There's something about an old-school cut that tells the stadium you're in this for the history, not the scoreboard. Our Cooperstown collection lives in that lane — and the throwback jersey guide goes deeper than we can here.

Name, number, your call

A rivalry game is a great excuse to make it personal — your name, your number, your inside joke with the guy sitting next to you. The custom jerseys collection is where that usually starts. Fair warning: not all numbers are built the same. Stitch and print hold up differently over a season of wash days, which the stitched vs. printed guide covers in detail.

Layer for the ballpark, fit for everybody

Day game in April, night game in July, wind off the water in San Francisco — a rivalry series can put you through three seasons in 72 hours. Layer, don't overpack, and make sure whatever you bought actually fits. We carry big & tall, women's, and youth cuts, and the size guide is the fastest way to avoid the dreaded jersey-swap-at-the-gate. For the washed-and-worn look that doesn't wreck the name on the back, the jersey wash guide is the one to bookmark.

One honest note on "official"

Quick reality check, because it matters: gear sold here is fan gear. It's not officially licensed MLB merchandise, and we're not going to pretend otherwise. What you're getting is a well-made jersey for people who love the game — designed to be worn, washed, and talked about, not locked in a display case.

05Rivalry Week FAQ

06Keep Reading

This guide is the hub. Go deeper on the details.

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