sentences:  Mayhew joined the Lions front office in 2001 and was appointed senior vice president and assistant general manager in 2004 by Matt Millen and served as assistant to Matt Millen through 2008.Mayhew was promoted to acting General Manager of the Detroit Lions after the firing of Matt Millen.On December 29, 2008 it was announced that Mayhew would be officially promoted to General Manager.