Most baseball analysts blurt out observations that beg for further examination here and there. Ken Rosenthal, the Fox Sports writer and commentator, and one of the best analysts of the breed, is one of them. Here he is, musing about Don Mattingly’s growth as a manager in light of having had “three strikes” against him when he took the command post for the Los Angeles Dodgers last year: He had never managed in the majors or minors. He had to exert greater authority over players who knew him only as a coach. And he had been a great player — a drawback, seeing as how great players rarely make great managers.