The 49ers hired Mike Martz as their offensive coordinator Tuesday, landing one of the NFL's top offensive minds to fix a unit that floundered last season. Martz tormented the 49ers for six years during his greatest success with their NFC West rival Rams, but was fired by the Lions last week after two seasons as offensive coordinator. He replaces Jim Hostler, who also was fired last week after the 49ers matched a franchise low and finished last in the NFL with 219 points. San Francisco's offense was derided as bland and conservative -- something that shouldn't be a problem with Martz on board.