Rose tore his left ACL on April 28 in Game 1 of the Eastern Conference quarterfinals against the Philadelphia 76ers. He underwent surgery on May 12, and the recovery is expected to take between 8-12 months.
The Bulls went 18-9 during the regular season and 1-4 in the playoffs without Rose last season.
“We still did good even when we didn’t have Derrick (last season),” said Gibson, who threw out a ceremonial first pitch before the Chicago White Sox's game on Monday. “We beat the Heat without Derrick."