Within the 25-45 days, the Minnesota Timberwolves, for the first time in more than a decade, will likely not have the worst all-time win/loss record of any active NBA franchise. They have won 42.08% of their games all-time (since 1989), while the Nets are down to 42.21% (since 1977)
https://en.wikipedia.org/wiki/List_of_all-time_NBA_win%E2%80%93loss_records
The Timberwolves and Nets have been moving in opposite directions of late, and the Wolves finally have the chance to free themselves of an obscure dubious distinction. Last season, the Timberwolves finished with 49 wins, while the Nets had 20.
The Timberwolves will play seven games in October, while the Nets will play just 5.
https://www.nba.com/timberwolves/schedule
https://www.espn.com/nba/team/schedule/_/name/bkn/seasontype/2
The soonest that the Timberwolves could overtake the Nets is October 25th, after which point both teams will have played three games.
If the Timberwolves win their first three and the Nets lose their first three, a solid possibility, the Timberwolves will have won 42.14% of their games all-time (1,248 out of 2,961), and the Nets will have won 42.13% (1,700⁄4,035).
This is counting only NBA records, as the Nets had very successful years in another league, the ABA, with Dr. J.
If you’re wondering why the Timberwolves took over the worst record a decade ago and have had it ever since despite being good for half of the time in between, the answer is the Clippers.
That franchise, around since 1970, had been by far the worst in league history for years, before pulling themselves up by their boostraps and improving through fair and honorable means. They might now be another one to watch on this list long-term currently at 42.8%.
After the 2014-2015 season, the Clippers held a 38.9% winning percentage, and the Timberwolves were at 39.3%.
https://www.statmuse.com/nba/ask?q=timberwolves+all-time+record+1970-2015
https://www.statmuse.com/nba/ask?q=clippers+all-time+record+1970-2015
I didn’t pinpoint the exact date (probably the thing to do next), but the Clippers surpassed them the next season in early 2016, and never lost their advantage again.
https://www.statmuse.com/nba/ask?q=clippers+all-time+record+1970-2016
https://www.statmuse.com/nba/ask?q=timberwolves+all-time+record+1970-2016