Start Gronkowski if you're willing to take the risk. Ertz is the safer play, but Gronkowski has a higher upside

gronk the miami secondary isnt so goood and with tom brady throwing the ball it should be a recipe for a lot of receptions but zach ertz is a very good te too so if gronk gets hurt then put in ertz. some other good te are greg olsen and zach miller

Gronk, don't bench your studs