Brown was injured Thursday in a workout before the start of training camp. The team is calling it a third-degree sprain and Brown is wearing a protective boot. The injury could mean Brown won't be ready for the start of the regular season.
Charlotte signed the 6-foot-11 center to a one-year, $1.3 million deal last month. It reunites him with owner Michael Jordan, who was criticized for taking the underachieving Brown No. 1 overall in the 2001 draft.
Brown is expected to provide depth at center after the Bobcats traded Tyson Chandler to Dallas.