The NEW YORK YANKEES!!
The pro sports team that has won the most championships are the Boston Celtics. They won eight consecutive championships from 1959 to 1966.
Football = Sir Alex Ferguson
In Spain, Real Madrid have won 32 La Liga championships. In North America, the New York Yankees have won 27 MLB championships and the Montreal Canadiens have won 24 NHL championships.
The Boston Celtics' streak of 8 consecutive NBA championships is the longest streak of consecutive championships in U.S. professional sports history
New York Yankees