WEDNESDAY, 10:02am: The Rockets have assigned Motiejunas and Machado to the Rio Grande Valley Vipers, according to RealGM.com's transactions log. Given White's uncertain status, it appears he hasn't been officially signed to Houston's D-League affiliate at this point. As Hoops Rumors' Chuck Myron pointed out last night, NBA teams were previously limited to assigning two players at a time to D-League affiliates, so it's not clear whether that affects White's situation or if the rule has changed.
MONDAY, 10:47pm: The Rockets are sending Royce White, Donatas Motiejunas, and Scott Machado to their NBA D-League affiliate, according to Mark Berman of FOX 26 (via Twitter). Of the three players, Motiejunas is the only one to have logged NBA minutes with five minutes of play last night against the Pistons.
White, the 16th overall pick in the 2012 draft, picked up national attention for his unexpected absence from Rockets training camp over the summer. It turns out that the forward was struggling with anxiety issues, including a fear of flying. Later in the week, the two sides worked out an agreement in which White could travel to a portion of road games via bus rather than fly with the team.