The 33-year-old veteran played for Houston during the 2017/18 season, averaging 7.5 points and 3.0 rebounds in 61 games. He signed with the Clippers before the start of last season, but was only able to play in four games because of a knee injury that required surgery last March. He was waived in April just before the start of the playoffs.
Mbah a Moute has played 11 NBA seasons, spending most of his time with the Bucks and Clippers. He is a defensive specialist who shoots 33.5% from 3-point range for his career.
Houston has a full roster, so someone would have to be waived before Mbah a Moute could be signed.