"I would like to stay here the whole spring training, because I know it's better for me and better for them, but I was giving my word to [the Dominican team], to Moises, the GM," Castillo said Friday "… Before I signed here, I said I was going to play. And I'm the kind of guy who when I say something, I like to prove it. So honestly, I'm a little bit in between. This is my job. I have a job to do here, too. I'm going put my emphasis on anything and everything I do here with the pitching staff when I'm here with my teammates."