Boston College linebacker Mark Herzlich, who returned to the field in 2010 after missing 2009 while recovering from cancer, remained upbeat about his NFL prospects despite going undrafted.

"I have been told that I can't play football before," Herzlich tweeted Saturday night after the conclusion of the NFL draft. "We all know what happened with that."

After the Senior Bowl in late January, ESPN's Scouts Inc. rated Herzlich as a late fifth-round selection, but he was considered an early-round prospect before being diagnosed with Ewing's sarcoma, a form of cancer that attacks the bones, following a stellar 2008 season.