Here is the list I mentioned in my previous comments of the Latin players who are listed by MLB as not being allowed to play in winter ball because they have passed "extreme fatigue" thresholds.
The thresholds for pitchers are:
MLB/AAA -160 IP or 60 appearances
AA - 150 IP
A - 130 IP
Short A - 75 IP
Rookie - 70 IP
The thresholds for hitters are:
MLB - 502 AB
AAA - A - 550 AB
There are also thresholds for catchers but I have no idea what entries recieved are so I won't try to guess.
Here are the Venezuelan Astros who are on the list:
Carlos Quevedo P
Luis Alvarez C (injury)
Jhonny Medrano INF (injury)
Felipe Paulino P
The various winter ball teams can appeal the decision and if overturned, the players can start playing in December. There is a Dominican list with at least 75 names on it but I can't find it yet.