The 49ers are the first team since 1920 to record a rushing touchdown while not allowing a score on the ground in each of their first seven games, according to the Elias Sports Bureau. San Francisco is 6-1 heading into Sunday's matchup with Washington. On offense, the 49ers have run on 53.6 percent of their plays this season while the rest of the NFL's 31 teams have run on 43.2 percent of their plays. They have good reason to buck the league's pass-first trend -- in their past four games, they've averaged 188.5 rushing yards and 5.8 yards a carry.