Castro signed a two-way contract with the Rockets on Wednesday.
Ighodaro has spent the offseason working to expand his offensive game, with the third-year big man specifically focusing on his free-throw shooting and three-point range, Duane Rankin of The Arizona Republic reports.
Highsmith was waived by the Suns on Wednesday, Michael Scotto of HoopsHype.com reports.
Fleming will likely have to navigate through a crowded Suns frontcourt for an Opening Night role.
Maluach is set to battle with Oso Ighodaro for the top backup role at center behind Mark Williams during training camp.
Phillips signed a training camp contract with the Rockets on Friday, Paul Garcia of The Spot Up Shot reports.
Tshiebwe agreed to a contract with the Rockets on Friday.
Tate agreed to a one-year, $3.07 million contract with the Rockets on Thursday, Michael Scotto of HoopsHype.com reports.
The Rockets signed Tate to a contract Thursday, per Adam Spolane of Sports Radio 610 Houston.
Huntley (hamstring) is out for Saturday's Las Vegas Summer League finale versus the Spurs, Duane Rankin of The Arizona Republic reports.
