The 49ers have two games to play, but left guard Aaron Banks is done for the year.

So is left tackle Jaylon Moore.

So is Pro Bowl tackle Trent Williams.

And possibly linebacker Dre Greenlaw.

Those were the updates provided by coach Kyle Shanahan Monday during his weekly conference call with local writers the day after a 29-17 loss to the Miami Dolphins. The 49ers have won just one of their past six games and were officially eliminated from the playoff race before kickoff.

That’s life with the 49ers during a 6-9 season, where the news is usually bad.

For Banks, who has an MCL injury, it could be his last in a 49ers uniform. He is scheduled for unrestricted free agency in the offseason. The same goes for Moore, who has a quad strain and is also a potential free agent.

As for Williams, Shanahan had been publicly holding out hope of a late-season return from an ankle injury, but that’s not going to happen.

“He won’t be playing the next two games,” Shanahan said. “He hasn’t improved enough to get him out there and we don’t see that happening in the next two weeks, especially with the situation we’re in.”

The 49ers finished the Miami game with Spencer Buford, the No. 3 tackle, replacing Moore and Nick Zakelj filling in for Banks. And Burford is no sure thing to face Detroit when the 49ers host the Lions in Week 17 on Monday night.

Burford has a calf injury and will be monitored this week. The 49ers are presently perusing practice squads of other teams for additional bodies to play both guard and tackle to fill out the season. Austin Pleasants, a recent practice squad addition, was promoted Saturday.

As for Greenlaw, who left after four snaps one week after playing for the first time since Achilles surgery, it sounds as if he won’t play against Detroit or Arizona.

Running back Isaac Guerendo, who missed the Miami game with a hamstring strain, is day to day and could practice Thursday. Linebacker Dee Winters (chest) is also day to day.

PURDY IN PERIL? >> Shanahan said he is giving no thought to sitting quarterback Brock Purdy, who is ostensibly the club’s franchise quarterback heading into the future but will be playing behind an offensive line in tatters.

Shanahan wants healthy players to fulfill their contractual obligations and isn’t interested in selling players on the notion of competing even

WILLIAMS’ PAINFUL SEASON >> Williams ended up playing 10 games this season, his fewest since he played 10 in 2017 for Washington. At age 36, Williams sat out training camp while negotiating a three-year, $82.66 million extension with a $25.7 million signing bonus and $48 million guaranteed.

He and his family have been grieving the past month since his wife, Sondra, gave birth to a stillborn son, Trenton O’Brien Williams Jr.; a twin daughter was lost earlier in the complicated pregnancy.

When he signed that contract Sept. 3, he expressed a desire to play until he was 40 and do so at an All-Pro level, though this season’s 10-game performance likely wasn’t enough to earn him a fourth All-Pro nod. He’s been a Pro Bowler each of the past 11 seasons he’s played.