Boston College linebacker Mark Herzlich will be allowed to stay as long, or short, as he'd like at the 2011 NFL Draft, according to league sources. Herzlich, whose struggle against cancer is one of the more gripping emotional sagas of this draft, will attend the event, but has been granted open-ended status in terms of his participation this weekend. The defender, who was seen as a potential top-15 draft pick prior to missing the 2009 season while battling a rare form of cancer, knows that there is great uncertainty about when he will be drafted.