Bradley's contract carries a player option for a second year, per Yahoo! Sports' Chris Haynes.
The move begins to fortify the Bulls' front court depth after parting with Thad Young in the seismic sign-and-trade for DeMar DeRozan that was agreed upon Tuesday evening.
Bradley, 23, is a 6-foot-10 center with four years of NBA experience under his belt. The 28th pick in the 2017 NBA Draft out of North Carolina, he spent three seasons as a reserve for the Utah Jazz before being traded to the Pistons, then 76ers, then Thunder over the course of the 2020-21 campaign.
Last season was his best yet. Bradley averaged 7.1 points, 5.7 rebounds, 0.7 blocks and shot 66.5 percent from the field in just 16.3 minutes per game across 42 appearances with the 76ers and Thunder.
Funny enough, one of his best games of the season — a 14-point, 5-rebound, 3-block effort — came in the United Center against the Bulls in the first game after the 2021 All-Star break, which Philadelphia won handily without Joel Embiid and Ben Simmons.
As the roster currently stands, Bradley and 2020 second-round pick Marko Simonović figure to be the team's primary front court backups. Lauri Markkanen's restricted free agency also has yet to be resolved.
With nine roster spots occupied (not including Simonović or 2021 second-round pick Ayo Dosunmu, who have yet to sign), work remains to be done.