Adam Schefter of NFL Network has reported that the San Francisco 49ers have hired Mike Martz as their offensive coordinator. Martz replaces Jim Hostler who was fired after the 2007 season and lead the offense to a dead last ranking in the NFL.

Martz was the offensive coordinator for the Detroit Lions during the past two seasons and was with the head coach of the St. Louis Rams prior to that.

Source:
ProFootballTalk.com