Thomas, a 15-year veteran, averaged three points and four rebounds last season for the Milwaukee Bucks. He will back up Joakim Noah, essentially replacing Brad Miller's role on the roster. Thomas will undoubtedly serve as a mentor for Noah, as Miller did, and will help rookie center Omer Asik adjust to the NBA.
With Thomas' addition, the Bulls are expected to add one more guard in the next week, which would give them 12 players under contract heading into training camp.
Thomas has averaged nine points and seven rebounds during his career.
Nick Friedell covers the Bulls for ESPNChicago.com and ESPN 1000.