Cook (ankle) remains out for Monday's game against the Grizzlies, K.C. Johnson of NBC Sports Chicago reports.
Cook will be sidelined for an eighth straight game due to a left ankle sprain, and the Bulls have yet to offer up a potential target date for the big man to make his return to action. Even when healthy this season, Cook hasn't been a consistent member of Chicago's rotation. He's appeared in nine games for Chicago to date, averaging 4.4 points and 2.3 rebounds in 10.4 minutes.