By the end of his 15 minutes on Tuesday in the same pavilion where he once had his famous steroids-admission press conference, seemingly a lifetime ago, Alex Rodriguez the retired player sounded like much more than a part-time minor league instructor. In some ways he sounded like the manager or GM, assessing the chances of the 2017 Yankees with candid insight, emphasizing the importance of developing the young talent for this rebuilding franchise, even though “It’s going to be painful to watch sometimes.”