SANTA CLARA Coach Jim Harbaugh on Monday insisted running back LaMichael James has a "big role" with the 49ers even though he was a healthy scratch for Sunday's game against the Cardinals.
"We definitely all value LaMichael as a backup running back," Harbaugh said. "And there's going to come a time, like last year, where he's fully in the mix and depended on."
James, however, has had only a bit role on offense and special teams this season. After returning from a knee injury in Week 4, he has seven carries for 31 yards and one kickoff return for 29 yards.
He and guard Joe Looney are the only remaining members of what is quickly becoming an infamous 2012 draft class. Both were healthy but did not play in Sunday's 32-20 win over Arizona. Looney has yet to dress after 25 games.
James, a star running back at Oregon and second-round draft pick, showed frustration with his meager role last month.
"Some things I just don't understand at all," he tweeted. "I don't work at State Farm. I'm not trying to be insurance."
James later deleted the entry, but Harbaugh said he was aware of the running back's feelings.
"He'll be back playing," Harbaugh said. "I know the talk about insurance, et cetera. It's no slight to LaMichael. LaMichael is a very good player. And he's a very valued member of our team."
It's hard to see where James, who excels as an outside runner, fits in an offense that has relied on power running in recent weeks.
Frank Gore finished with 101 yards against the Cardinals and ranks fifth in the NFL in rushing. Kendall Hunter had three carries, including a 6-yard touchdown that capped a pivotal, 18-play drive at the beginning of the fourth quarter. James did not suit up for any games last season until Hunter suffered an Achilles' tear Nov. 25.
Harbaugh, however, said that depending on the opponent, the 49ers sometimes will dress only three running backs instead of four. The three runners against the Cardinals were Gore, Hunter and Anthony Dixon, who has a large role on special teams.
"When all the running backs are healthy and playing, there'll be a week-to-week thing whether we go three or four," Harbaugh said.
James was the team's primary punt returner in the exhibition season. Kyle Williams has taken over the role since the start of the regular season but hasn't added much pop to the return game. The 49ers rank 20th in average punt return yardage, and Williams leads the league with 16 fair catches.
Asked if James could provide a spark as he did in the kick return game last season, Harbaugh said, "He's definitely an option in the return game."
Reinforcements arrive Harbaugh said two rookies, defensive linemen Quinton Dial and Tank Carradine, and two veterans, wide receiver Mario Manningham and cornerback Eric Wright, would start practicing today after coming off injury lists.
Nose tackle Glenn Dorsey's hamstring injury may put pressure on Dial, a fifth-round pick, to contribute quickly. Ray McDonald obviously was affected by his biceps injury against the Cardinals. That might create a need for Carradine, a second-round pick, to play defensive end.
Once the players resume practice, the 49ers have up to 21 days to elevate them to the 53-man roster. Harbaugh was optimistic Sunday that Dial would be ready for this Sunday's game at Tennessee. The coach struck a more cautious tone Monday.
"There's a process once they come back (to practice) to being ready to compete in games," he said. "Then the final step is, they've got to be better than somebody at their position."
A federal issue Harbaugh said the ongoing government shutdown caused "one or two" problems with obtaining passports for players. But he said the team was "working through" those issues. The 49ers will travel to London on Oct. 21 and play the Jaguars there on Oct. 27.
Read Matthew Barrows' blogs at www.sacbee.com/sf49ers and listen for his reports Tuesdays on ESPN Radio 1320.