New England Patriots
The Patriots have been dominating the AFC since the reign of Tom Brady in 2001. New England has been to the last 6 AFC Championship games and out of Brady's 15 healthy seasons as a starter, the Patriots have appeared in 11 AFC Championship games.
The Celtics have the most NBA championships at 17. They have been dominating the NBA since the reign of legends like Bob Cousy, Sam Jones, Tommy Heinsohn, Bill Russell, John Havlicek, Larry Bird, and the list goes on. Boston has dominated the 1960's having won every year in the decade except 1967 where the Philadelphia 76ers defeated the San Francisco Warriors.
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