Citing an injury, Louisville's Earl Clark, a 6-10 forward, did not show for a scheduled workout with the Bulls on Sunday.
Gonzaga's Austin Daye and Micah Downs, UCLA's Josh Shipp, Memphis' Antonio Anderson, West Virginia's Alex Ruoff and Clemson's K.C. Rivers were at the Berto Center.
A power outage cut Saturday's workout short. The air conditioning was still not functioning Sunday.
The Bulls will try to reschedule Clark before the draft Thursday. The Bulls have two first-round picks (Nos. 16 and 26). As is the normal practice when without a lottery pick, the team is talking to many teams about various trade possibilities for moving up or down.
There is a good chance Clark will be selected in the first 15.