What is the fine-grained topic of the following text: Four days after Chip Kelly left the Ducks for the NFL�s Philadelphia Eagles, Oregon signed Helfrich to a five-year, $9 million contract to take the helm of a program that played in its fourth straight BCS bowl game not even three weeks ago. Only return the topic.
Mark Helfrich's signing as Oregon Ducks' head coach after Chip Kelly's departure to the NFL.