SANTA CLARA — LaMichael James’ availability for Sunday’s season opener is in question because of a knee injury, but that hasn’t prevented the 49ers from listing him as their first-string returner on punts and kickoffs.

Coach Jim Harbaugh indicated Tuesday morning on KNBR 680-AM that James will “be back soon.” Kyle Williams is listed as the second-string returner and Perrish Cox the third-team option, regarding both punts and kickoffs. Kendall Hunter is not listed.

The 49ers don’t list any backups at their offensive tackle positions, although Adam Snyder is a probable option unless the 49ers opt to shift Alex Boone out from right guard.

The rest of the depth chart falls in line with how the 49ers have shaped it in recent weeks:

* * *

OFFENSE

Quarterback: Colin Kaepernick, Colt McCoy, B.J. Daniels.

Running back: Frank Gore, Kendall Hunter, LaMichael James, Anthony Dixon

Fullback: Bruce Miller, Anthony Dixon

Wide receiver: Anquan Boldin, Marlon Moore, Jon Baldwin

Wide receiver: Kyle Williams, Quinton Patton, Chris Harper

Tight end: Vernon Davis, Vance McDonald, Garrett Celek

Left tackle: Joe Staley

Left guard: Mike Iupati, Joe Looney

Center: Jonathan Goodwin, Daniel Kilgore

Right guard: Alex Boone, Adam Snyder

Right tackle: Anthony Davis

* * *

DEFENSE

Left defensive tackle: Ray McDonald, Tony Jerod-Eddie

Nose tackle: Ian Williams, Glenn Dorsey

Right defensive tackle: Justin Smith, Will Tukuafu (Demarcus Dobbs is suspended in Week 1)

Outside linebacker: Ahmad Brooks, Dan Skuta

Inside linebacker: NaVorro Bowman, Nate Stupar

Inside linebacker: Patrick Willis, Michael Wilhoite, Nick Moody

Outside linebacker: Aldon Smith, Corey Lemonier

Left cornerback: Carlos Rogers, Tramaine Brock

Right cornerback: Tarell Brown, Nnamdi Asomugha, Perrish Cox

Free safety: Eric Reid, C.J. Spillman

Strong safety: Donte Whitner, Craig Dahl, Raymond Ventrone

* * *

SPECIAL TEAMS

Kicker: Phil Dawson

Punter: Andy Lee

Holder: Andy Lee

Long snapper: Kevin McDermott

Punt returner: LaMichael James, Kyle Williams, Perrish Cox

Kickoff returner: LaMichael James, Kyle Williams, Perrish Cox

For more on the 49ers, see Cam Inman’s Hot Read blog at blogs.mercurynews.com/49ers. Follow him on Twitter at twitter.com/CamInman.