Is 6:00 the Deadline for picks and Ogun?

[Nublar7]

http://www.miami.com/mld/miamiherald/sports/football/9277893.htm

As the clock ticks toward 6 p.m. today, when Dolphins players are expected to report for training camp, the team might face going through the first day or two of camp without top draft pick Vernon Carey under contract.

Do we need to sign them before 6:00 today? If not signed, they can't take part tommorrow? All we need to sign is Carey and Ogun since the other five picks already signed. Dolphins have 1 hour and 30 minutes to sign Ogun and Carey. LETS GET MOVING FINS!