Manager Bobby Valentine has ruled out any possibility of Cook helping his team as a relief pitcher. That is mainly due to health considerations.
"He has some situations that they tell me about, and it would be best served for him at the beginning of the season if he stays on line [in the rotation]," said Valentine.
Valentine continues to like what he sees from Cook, particularly when you consider the righty started later than the other pitchers during camp.
"His sinker is the real deal," Valentine said. "He obviously had it in the first inning, with five or six outs on 13 pitches against a Double-A crew [on Wednesday]. His offspeed stuff is still coming. He's very far along."