The Miami Dolphins have a youth movement coming in at edge defender behind the duo of Jaelan Phillips and Bradley Chubb. And a bond between draft picks Chop Robinson and Mohamed Kamara goes back before Robinson, out of Penn State, went to the Dolphins in the first round and Kamara, from Colorado State, in the fifth two weeks back. The two trained together in the pre-draft process, working out in Phoenix before ending up on the same professional team, sessions that often saw smack talk flying back and forth. They reunited Friday at Dolphins headquarters for the start of a two-day rookie minicamp that involved 46 players, including tryout prospects with the team’s seven draft picks and 12 undrafted rookies. With Robinson and Kamara already comfortable enough with each other to throw playful jabs, the young duo can push one another competitively as they eventually get into organized team activities, mandatory minicamp and eventually training camp in late July. “He always talks trash,” Robinson said of Kamara.