By Nick Selbe Duncan died on July 15 after going into cardiac arrest while on a run. Former Notre Dame offensive lineman Paul Duncan, who played five seasons for the Fighting Irish, died on July 15, the school announced. He was 35 years old. Duncan was on a run in his neighborhood when he went into cardiac arrest, his wife revealed in an Instagram post. “Our prayers go out to the family and friends of Paul Duncan,” read a statement from the Notre Dame football Twitter account. “A great teammate, but more importantly a loving husband and father.” Duncan’s wife, Ellen, said his body will be “don…