The Utah Jazz are 1-11. That’s worse than any 12 game start they had during their recent tanking seasons.
2022-23: 9-3
2023-24: 4-8
2024-25: 3-9
2025-26: 4-8
2026-27: 1-11
2022-23 was the first season post Gobert and Mitchell, but Conley and some other vets were still on the team and they were traded at the deadline and they finished 37-45.
Source: Game logs via basketball reference, e.g. https://www.basketball-reference.com/teams/UTA/2023_games.html
I didn’t check back further seasons but based on their history I would guess this is the worst start in franchise history.