No matter if Bulls are able to do a Sign/Trade for a player with NG contracts or if they totally strike out in free agency, they always have opportunity to still use Boozer as trade asset. here is a trade that may work...
Boozer 2014 Salary: 16.8 million
Rationale - Milwaukee has been rumored to want to trade Mayo. His contract doesn't end until 2016 however an expiring 8 million dollar contract next year may not be a bad thing to have incase a trade opens up next offseason. Also, Bulls have been rumored to want Ramon Sessions as backup PG and with sign/trade could make this happen. Mayo could be a good second ball handler at the SG position. I know he didn't play too well for Bucks last season but he has ability to handle ball and score at times.
Bulls would then have MLE to use on Mirotic, and BAE to use on another shooter