6. PORTLAND TRAIL BLAZERS: 53.6 PERCENT
31 winning seasons in 48 years
The Portland Trail Blazers missed the playoffs in their first six years as a franchise. The first time they made it, though, they were able to secure the lone championship in their team’s history. Since then, Portland hasn’t been able to reach the mountaintop again, but they’ve been a playoff team in 35 of their last 42 years, a ridiculous feat in its own right.
7. PHOENIX SUNS: 53.2 PERCENT
28 winning seasons in 50 years
It may be surprising to see them so high up on this list considering what their last few years have looked like, but the Phoenix Suns, before this poor run, were one of the league’s most stable teams for a long while. The Suns had a 33-year run, ranging from 1977-78 to 2009-10, where they made the playoffs an astounding 27 times.
8. HOUSTON ROCKETS: 52.5 PERCENT
31 winning seasons in 51 years
A two-time championship franchise, the Houston Rockets have almost always put out good teams throughout their history. Houston has made the playoffs in 61.5 percent of their seasons.
9. MIAMI HEAT: 51.9 PERCENT
19 winning seasons in 30 years
Among the NBA’s younger franchises (they only joined the league in 1988-89), the Miami Heat have easily been the most successful. They have three championships in their history, and have only missed playoffs five times in the last 24 years.
10. CHICAGO BULLS: 51.6 PERCENT
26 winning seasons in 52 years
The Chicago Bulls have boasted a winning record in exactly half of their seasons as a franchise, made the playoffs just over 66 percent of the time and won six championships (tied for the third-most of any team) thanks mostly to that Michael Jordan guy.