NBA sources told FOX 26 Sports the Rockets are sending forward Royce White, forward/center Donatas Motiejunas and guard Scott Machado to the team's NBA Development League affiliate, the Rio Grande Valley Vipers.
Motiejunas has played in one game in the regular season, scoring three points.
White and Machado have yet to see action.
White was taken by the Rockets with the 16th overall selection in the first round of this year's NBA Draft out of Iowa State.
Motiejunas was acquired in a trade with the Dallas Mavericks during the 2011 NBA Draft and spent that season in Europe.
Machado was signed this offseason as an undrafted free agent from Iona.