When Jon-Eric Sullivan was introduced as the Miami Dolphins' new general manager in January, he explained a core philosophy he brings from his two-plus decades with the Green Bay Packers. It is to draft, develop and retain your own homegrown talent. He probably won't go the way of ex-GM Chris Grier, in building a few draft classes from 2019 through 2021 and then pivoting sharply to a slew of high-priced outside talent, which played a role in letting his own players fall by the wayside.