I would posit that there are the following possibilities:
1. He's sitting on the bench (unlikely)
2. He's injured (maybe)
3. He went home to CA for Thanksgiving (unlikely)
4. The team sent him home (likely)
I'd bet he's been sent home, although I have no information on this. I will try to track down an official story.
Unlike in the minor leauges, Winter ball teams are trying to win games. They generally have very little patience for young foreign players' struggles. Basically, it's hit or go home.