According to K.C. Johnson the Bulls have worked out Sean May. May has also canceled his workout with the Clippers after getting a commitment from a team (not necessarily the Bulls, but possibly the Bulls).
With most of the league fixated on Utah matching Portland's offer sheet to Paul Millsap, thus making Carlos Boozer eminently tradeable, the Bulls were one of many teams that quietly worked out power forward Sean May in Las Vegas.
May, the 13th overall pick by Charlotte in 2005, became an unrestricted free agent when the Bobcats didn't make him a qualifying offer. May cancelled a scheduled Thursday workout with the Clippers, claiming he had received a commitment from a team.
If May can prove healthy, then he's a great replacement for Aaron Gray providing similar bulk with much more offensive skill. The signing of May wouldn't impact a trade of Boozer one way or the other in my opinion as it'd e lunacy to count on May to be more than a bit player, and his minimum contract will reflect that.
The Bulls only have six days left to pull Aaron Gray's qualifying offer, so they need to make a decision on that front quickly.