We close the book on our offseason preview for the Cubs on this episode of Onto Waveland with a look at the rotation.Yu Darvish, Kyle Hendricks, Alec Mills and Adbert Alzolay will be back, but Jon Lester, José Quintana and Tyler Chatwood are impending free agents. Could the Cubs bring back any of them? Brett Taylor, Sahadev Sharma and Patrick Mooney break it all down.Follow Brett on Twitter: @BleacherNationFollow Sahadev on Twitter: @sahadevsharmaFollow Patrick on Twitter: @PJ_MooneyLearn more about your ad choices. Visit megaphone.fm/adchoices