(Portland, OR) -- Officials at Portland State University say a 20-year-old student and member of the Vikings football team has died. A.J. Schlatter died Sunday night following a complication from minor throat surgery. Schlatter, who was initially a walk-on, earned a full football scholarship at PSU as a redshirt freshman. Family members say A.J. died after a blood clot developed following surgery to have his tonsils removed.