SANTA CLARA — Coach Kyle Shanahan’s message to the 49ers entering this weekend’s bye was, well, what do you think it would be when you lose 8-of-10 games?

“I want them to sit there and really think of what their goals are for the rest of the half,” Shanahan said. “Do they want to solidify themselves as a starter, a backup? Do they want to be a part of it here?

“Do they want to be one of the answers or a solution to what we’re going through?”

This, however, isn’t just about the remaining six games. This is also about next year and beyond.

Here is how the 49ers stack up for 2019, before they resume action at Tampa Bay next Sunday:

QUARTERBACKS

Lock: Jimmy Garoppolo (injured reserve)

Probable: Nick Mullens, C.J. Beathard

Doubtful: Tom Savage

Analysis: Garoppolo is off crutches six weeks after ACL surgery, and he’s on track to ease into spring practice. Nick Mullens is two starts into an encouraging audition for next year’s No. 2 backup role, and it’s a wait-and-see situation if C.J. Beathard gets another shot this season.

Offseason need: No.

* * *

RUNNING BACKS

Lock: Jerick McKinnon (IR), Matt Breida, Raheem Mostert (IR), Kyle Juszczyk (FB)

Probable: None

Doubtful: Alfred Morris, Matthew Dayes

Analysis: McKinnon’s knee injury allowed Breida to thrive and vie for 1,000 yards. Morris’ predictable run calls have him averaging 23 yards his past six games. Mostert, already a special-teams maestro, proved an uplifting rusher until an arm fracture.

Offseason need: No, unless Le’Veon Bell surprisingly takes a prove-it deal.

* * *

WIDE RECEIVERS

Lock: Marquise Goodwin, Dante Pettis

Probable: Kendrick Bourne, Trent Taylor, Richie James Jr.

Doubtful: Pierre Garçon

Analysis: Goodwin hasn’t been as prominent as hoped, with only 17 catches (4 TDs) in an injury-hindered season. No one can match Garçon’s feistiness, but his flanker role is likely ticketed for someone else, and Bourne or Pettis must use this stretch drive to state their case. Slot production has been sparse from Taylor (back injury). James needs more reps.

Offseason need: Yes, via either free agency or a high draft pick.

* * *

TIGHT END

Lock: George Kittle

Probable: Garrett Celek

Doubtful: Ross Dwelley

Analysis: Kittle, in on his second year, should become the first 49ers tight end to ever produce 1,000 yards, 535 of which already have come after the catch. “Celek Time” means more blocking this year, and it’s worth retaining at $1.7 million in 2019.

Offseason need: Perhaps, say another mid-round gem like Kittle.

* * *

OFFENSIVE LINE

Lock: Joe Staley, Laken Tomlinson, Weston Richburg, Mike McGlinchey

Probable: Mike Person, Garry Gilliam, Shon Coleman

Doubtful: Joshua Garnett, Erik Magnuson, J.P. Flynn (IR)

Analysis: The starting unit looks stabilized for the next couple years, as long as Staley doesn’t retire. Person, a pending free agent, has done enough since Day 1 to own the right-guard spot instead of Garnett, a 2016 first-rounder who’s barely played in 2018. Gilliam’s $4.5 million price tag is a lot for a backup swing tackle next year, but we haven’t seen what Coleman can do.

Offseason need: Perhaps, a guard and backup center.

* * *

DEFENSIVE LINE

Lock: DeForest Buckner, Solomon Thomas

Probable: Earl Mitchell, Sheldon Day, Dekoda Watson, D.J. Jones, Ronald Blair, Jullian Taylor

Doubtful: Arik Armstead, Cassius Marsh

Analysis: The 2019 salaries of Armstead ($9.1 million) and Marsh ($3.8 million) mean they better show greater production these remaining games, if not for the 49ers then other suitors. Neither Armstead nor Thomas sniffed the field on the Giants’ winning drive last game, which is as damning for them as the 49ers in general. Buckner could land the 49ers’ biggest extension ever for a defender. Thomas’ remaining should be as an interior linemen, rather than an edge setter.

Offseason need: Absolutely, preferably a veteran pass rusher and perhaps a high draft pick.

* * *

LINEBACKERS

Lock: Fred Warner, Reuben Foster

Probable: Brock Coyle (IR), Elijah Lee

Doubtful: Malcolm Smith, Mark Nzeocha

Analysis: Foster has six games left to return from a hamstring injury and emerge from a sophomore slump, though his 2019 fate isn’t perilous considering the 49ers’ staunch support this past offseason. Warner has been an every-down stalwart. Smith is a long shot to play out his contract’s remaining three years ($3.75 million in 2019).

Offseason need: Not really, but backup linebackers always are needed. Related Articles Jimmy Garoppolo’s injury may reveal a flaw with NFL officials’ face masks

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* * *

CORNERBACKS

Lock: Richard Sherman, Tarvarius Moore

Probable: Ahkello Witherspoon, K’Waun Williams

Doubtful: Greg Mabin, Emmanuel Moseley (IR)

Analysis: Sherman has been a model pro on and off the field in his arrival from Seattle. Witherspoon’s status is increasingly tenuous in Year 2. Moore needs cornerback reps these final games.

Offseason need: Yes, perhaps even with a top-five draft pick.

* * *

SAFETIES

Lock: Jaquiski Tartt, D.J. Reed

Probable: Marcell Harris, Adrian Colbert (IR)

Doubtful: Jimmie Ward, Antone Exum

Analysis: Most of the intrigue here is whether Ward can showcase his more natural safety skills (as opposed to cornerback) to earn a nice contract in free agency, perhaps even from the 49ers. Rookies Harris and Reed figure to see a lot of action through December.

Offseason need: Yes, a free safety is needed and Earl Thomas could be it.

* * *

SPECIALISTS

Lock: None

Probable: Robbie Gould, Bradley Pinion, Kyle Nelson

Doubtful: None

Analysis: As reliable and productive as this trio has been since 2017, contract extensions should are merited. None of the three is signed beyond 2018.

Offseason need: Yes, if anyone bolts.