The Bulls haven't had any significant injuries so far in training camp, but shooting guard Ronnie Brewer has spent much of the first three days on the sidelines with a slight strain of the right hamstring.
"Each day he's getting better, so he's doing more each day," coach Tom Thibodeau said. "He's doing some stuff. He hasn't done any of the contact yet, but he's coming along fine."
The Bulls say they are merely being cautious. Brewer suffered a partial tear of the same hamstring last season.
Center Joakim Noah has a slight ankle sprain, but participated in the entire three-hour workout today.