The next phase of the offseason officially begins on Wednesday morning for the Washington Commanders as they welcome the Miami Dolphins for a joint practice on Wednesday ahead of the first preseason game on Friday night at Northwest Stadium. So what should fans know ahead of the joint practice? With Washington's secondary TBD, how can Miami's pass catchers test the unit this week? Look for the Dolphins to go for the deep shots to test the Commanders' secondary. AdvertisementAdvertisement AdvertisementIt has to be the Dolphins' pass rush vs the Commanders' offensive line.