"We're real good with it," he said. "[Running backs] coach [Wilbert] Montgomery does a great job of rotating us in there in practice. [Offensive coordinator] Cam [Cameron] does a great job of calling the plays and getting us comfortable during practice so that when we get into the game, it's a piece of cake. It's a great feeling."
More than 60 percent of the offense's production has come from the ground game, which ranks second (190) in the NFL behind the Atlanta Falcons (203) in average yards per game.
That's why Harbaugh is more than comfortable with splitting carries among the running backs.
"We don't necessarily subscribe to the fact that one guy's got to carry it 35 or 40 times," he said. "If that was what you had and that was your strength, that's what you'd go with, but we feel fortunate to have three guys that can do it, and we're going to use all three guys."
End zone
Trevor Pryce's sack of the Browns' Derek Anderson in the second quarter gave the defensive end 80 career sacks, which is fifth-best among active players behind the Washington Redskins' Jason Taylor (118), the Tampa Bay Buccaneers' Kevin Carter (102), the Browns' Willie McGinest (85) and the St. Louis Rams' La'Roi Glover (83). "I didn't know that, and that's pretty cool," Pryce said. "But the guys ahead of me are way ahead of me." ... Spurred by linebacker Brendon Ayanbadejo, 20 players registered to vote through Rock the Vote.