49ers say they’ll try to extend both Michael Crabtree and Mike Iupati

The 49ers appear willing to do business with those who will do business with them. According to Matt Maiocco of CSNBayArea.com, 49ers General Manager Trent Baalke said the team wanted to try to extend both guard Mike Iupati and wide receiver Michael Crabtree before they become unrestricted free agents next spring. “We’re going to try,” Baalke…