The New England Patriots' three-day rookie minicamp has concluded, but that doesn't mean the retooling of the rookie class is over. In fact, one player parlayed a successful tryout into a spot on the roster. According to Doug Kyed of The Boston Herald , the Patriots are signing Hawaii safety Peter Manuma to a free agent contract to join the 90-man roster. The versatile defender, who was only in New England on a tryout basis, now has a chance to fight for a longer stay this fall. Manuma is six-foot and 200 pounds, and can pack a punch. In college with the Rainbow Warriors, the defensive back recorded 280 total tackles and five interceptions. The four-year starter was named one of the team's two captains this past season. He also worked out with the Seattle Seahawks during their rookie minicamp last week as well. During the rookie minicamp portion with reporters, Manuma was spotted returning punts from fellow tryout punter Mitch McCarthy.…