John Harbaugh was hired Friday as head coach of the Ravens, who hope their second choice proves to be a first-rate success. Harbaugh spent this season as Philadelphia's secondary coach after making a name for himself working with special teams. He has never been a head coach but has coaching in his genes -- his father Jack is former head coach at Western Kentucky, and his brother Jim,is head coach at Stanford and a former quarterback with the Ravens. The 45-year-old Harbaugh, who received a four-year contract, will be introduced as the third coach in Ravens' history at a news conference Saturday. His salary wasn't released, but most first-year NFL head coaches get slightly more than $2 million a season.