The Miami Dolphins ended up signing one of the players who attended their rookie minicamp on a tryout basis, showing an experiment that really worked out well. Filling the one available roster spot was DJ Herman, who was a linebacker at San Diego State but who the Dolphins listed as a fullback in the press release announcing his signing. Herman was one of 10 tryout players at the minicamp last week, all of them rookies. His addition will give Miami a total of 25 rookies — the 13 selections in the 2026 NFL draft, 11 others signed as undrafted free agents the day the rookie minicamp began, and now Herman. Herman is the only player who will be listed on the roster as a fullback. The Dolphins are carrying 91 players on their offseason roster because of the roster exemption they have for tight end Seydou Traore, the rookie fifth-round pick from Mississippi State, for being part of the International Player Pathway Program.…