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“He’s done considerably well,” 49ers coach Jim Harbaugh said after his team’s 17-3 win. “(Running backs coach Tom Rathman) has him working on that quite a bit in practice and he’s really done a good job.”

It hasn’t been a completely smooth transition from college to the NFL. Hunter played in a spread offense at Oklahoma State and had a pair of 1,500-yard seasons there but has been trying to learn the nuances of the West Coast offense Harbaugh is employing in San Francisco.

That’s meant more running between the tackles and sweeps, something he didn’t do a lot of in college. But like Hunter’s run against the Raiders, he’s approached it at full speed.

“He struggles a little bit but you can tell that he’s got the fight in him,” Dixon said. “When I saw him do what he did Saturday I wasn’t surprised. I saw what he did in college a couple times so no, I wasn’t surprised. Kendall’s here early every day and he puts in the work.”

Notes: Harbaugh declined to say when he’ll name a starting quarterback for the regular season. “I just don’t have any pressure on myself, as I look at it, to name a starting quarterback in a timetable manner,” Harbaugh said. … The 49ers still aren’t sure if injured wide receiver Michael Crabtree (foot) will be healthy enough to play in the opener. Crabtree remains on the team’s physically unable to perform list but is no longer wearing a protective boot.