NBA
Rings
Los Angeles Lakers vs Boston Celtics
Everyone knows this one
Philadelphia Eagles vs Dallas Cowboys
Very Historic and Canadian
Toronto Maple Leafs vs Montreal Canadiens
Really popular in the 2000's and still causes buzz to this day
New York Yankees vs Boston Red Sox
"The Game" (the biggest rivalry in College Football)
Michigan Wolverines vs Ohio State Suckeyes
Wilt
Golden State Warriors vs Los Angeles Lakers
Can still be a pretty good North battle
Baltimore Ravens vs Pittsburgh Steelers
Across the Hudson
New Jersey Devils vs New York Rangers
These two teams used to be from New York and their rivalry followed them to the West
Los Angeles Dodgers vs San Francisco Giants
The biggest rivalry in College Basketball
North Carolina Tar Heels vs Duke Blue Devils
A Central Division showdown (not as popular as it used to be)
Chicago Bulls vs Detroit Pistons
Bill
New England Patriots vs New York Jets
Two teams of the same Canadian province
Edmonton Oilers vs Calgary Flames
Due to recent playoff series, this rivalry has gotten even more heated
"The Iron Bowl" the biggest Intrastate rivalry in College Football
Alabama Crimson Tide vs Auburn Tigers
80's
Philadelphia 76ers vs Boston Celtics
Two extremely historic teams
San Francisco 49ers vs Dallas Cowboys
PA
Pittsburgh Penguins vs Philadelphia Flyers
This rivalry became a rivalry after an extremely controversial playoff series
New York Yankees vs Houston Astros
"Red River Rivalry" It is played in its own neutral site.
Oklahoma Sooners vs Texas Longhorns
Subway Series
New York Knicks vs Brooklyn Nets
Meadowland Memories
Philadelphia Eagles vs New York Giants
Northeastern (gonna be lowkey honest, I did not know they had a rivalry)
Boston Bruins vs Buffalo Sabres
This western rivalry has started to grow a little bit and is known for its dramatic games
Los Angeles Dodgers vs San Diego Padres
"Backyard Brawl" These two mideastern teams hate each other
West Virginia Mountaineers vs Pittsburgh Panthers