SANTA CLARA, Calif. – The San Francisco 49ers made a curious addition to their program this offseason when they hired two-time former NFL head coach Eric Mangini as an offensive consultant.Mangini, who spent the past two seasons as an ESPN analyst, is a defensive specialist. However, he was brought in to help the offense deal with defenses. So far, the arrangement seems to be working well.Thursday, San Francisco offensive coordinator Greg Roman raved about Mangini.