A couple of things (btw, this is a good read on WBC and about how teams feel about their players participating) : - The process goes like this: Players declare interest to WBC teams WBC teams select players MLB teams grant them permission to go - It is very unusual for players who are in a bubble to want to play. For example: ByungHo Park told the Korean team that he was not interested and once under contract with the Twins Breslow withdrew from team Israel to try to make the Twins. In the WBC you either see Veterans who have made their teams or minor leaguers with no hope to make their MLB team (like Dereck Rodriguez for the Twins) - Number 3 above is pretty typical. It is very rare for a team not to grant permission and those conversations usually happen before the players indicate interest to the WBC teams. Not granting permission is bad politics, because it is MLB-sponsored and all that jazz, but teams hate to have players they depend on to play at the WBC, esp. pitchers whose preparation gets all out of whack. - So players like Berrios, Santiago, Vargas, and Rosario are putting themselves at a disadvantage by participating and they know it. By participating definitely show that they do not care whether or not the will prepare like the rest of their teammates and have an optimal spring training to turn that mess of a team around, as much as playing for their Commonwealth's team. The point is not that the Twins have granted them permission (they pretty much had to.) They should have assessed their situation and the team's situation and should had know better than to ask. PS. Winter ball is different: 3 parties: players, winter team, MLB team. All have the right to ask and the right to deny. And usually all happens all the time. There are times that the Twins have asked players to play winter ball (last one Hicks) and the players declined, and vice versa.