Yahoo! Sports says that one player to watch in upcoming Niners camp is fullback Brit Miller, who was good on special teams last season:

Fullback Brit Miller: Miller played well on the 49ers’ coverage units late last season, and there’s a chance he could unseat veteran Moran Norris to become the team’s starting fullback. Miller was a decorated middle linebacker at the University of Illinois, but teams deemed him too small and slow to play that position in the NFL. However, he plays with real grit and passion, and he loves to hit. The 49ers have been happy with his progress, and he could be a nice fit in the team’s power-running offense.