Eric Berry has what Kansas City Chiefs' officials believe is lymphoma -- a form of cancer -- and has been placed on the season-ending non-football illness list.
Berry will undergo further testing at Emory University Hospital in Atlanta to complete the diagnosis.
"At this point in time, we don't have a definitive diagnosis," Chiefs trainer Rick Burkholder said at a news conference Monday afternoon. "But the leading consideration for what he has right now is lymphoma.
"We first were alerted to something on Thursday night. It's now Monday. We still don't have a definitive answer. That's OK. We'll get to the experts and we'll get the answer. We'll get a treatment program and we'll go from there."