Terms of the deal were not disclosed.
Biyombo spent the last two seasons in Charlotte and averaged 7.4 points, 5.8 rebounds, 0.9 blocks, and 19.4 minutes per game in 2020.
The 28-year-old made his NBA debut with Charlotte in the 2011-12 season when they were still the Bobcats.
He signed a four-year, $70-million contract with the Orlando Magic in 2016 after spending one season with the Toronto Raptors. In 2018, the Magic dealt him to the Hornets in a three-team trade with the Chicago Bulls.