Douglas-Roberts averaged 6.9 points, 2.4 rebounds and 1.0 assists in 49 games with Charlotte last season. The five-year veteran has also played for New Jersey, Milwaukee and Dallas.
Udoh averaged 3.4 points, 3.5 rebounds and 1.0 blocks in 42 games with the Bucks last season. The four-year veteran has also played for Oklahoma City.
The moves were announced Wednesday.