The University of Oklahoma
Dallas Cowboys. 20 consecutive winning seasons.
The Dallas Cowboys from 1966 to 1985 (20 seasons) hold the record for most consecutive winning seasons.
the same team with 26 worls series titles . YAnkees! Yankees! Yankees! The Yankees just guaranteed (with their most recent win), a winning season for 2010. This ties the record for 2nd most consecutive winning seasons. The most consecutive winning seasons in MLB history: 1st - The New York Yankees: 1926 to 1964 (39 consecutive winning seasons) 2nd (tie) - Baltimore Orioles from 1968 to 1985 (18 consecutive winning seasons) - New York Yankees from 1993 to 2010 (18 consecutive winning seasons - streak still intact)
Dallas Cowboys holds the record with a winning season every year from 1966 to 1985. It is also the record for most consecutive winning seasons of any professional sports team.
Patriots
Yankees
The Cleveland Browns have had a rough existence as a franchise. As the team opens their 2014-15 season, they have had 37 winning seasons in their 66 year history.
Washington baseball any league
I believe it is the SF 49ers with 17 winning seasons.
Dallas Cowboys with 20 from 1966-1985.
Linfield College