Kyle Shanahan refused to reveal who the San Francisco 49ers will start at quarterback with Jimmy Garoppolo listed as questionable ahead of their critical Week 18 clash with the Los Angeles Rams.
The Niners visit SoFi Stadium on Sunday aiming to extend their winning streak over the Rams to six games. A victory in the regular-season finale will clinch a playoff berth for the second time in three seasons.
Should the 49ers lose, then they would need the New Orleans Saints to suffer defeat to the Atlanta Falcons to secure their spot in the Wild Card round. A San Francisco loss and a Saints win would put New Orleans in the playoffs.
They will be facing a Rams team looking to clinch the NFC West title for the first time since the 2018 season.
And it remains unclear whether the Niners will do so with Garoppolo or rookie third overall pick Trey Lance under center.
Garoppolo missed the 49ers' 23-7 win over the Houston Texans in Week 17 after suffering a torn ligament in his right thumb in San Francisco's Week 16 loss to the Tennessee Titans.
After a shaky first half, Lance impressed in his stead, throwing for 249 yards, two touchdowns and an interception while adding 31 yards on the ground.
The 21-year-old, making only his second start, averaged the most air yards per attempt (11.91) of any quarterback last week and delivered an accurate, well-thrown ball on 82.6 per cent of his attempts.
However, Garoppolo has practiced in a limited capacity for three straight days, boosting hopes of a return to the starting line-up that head coach Shanahan would not confirm.
Garoppolo was listed as questionable and Shanahan told a media conference: "He had a good week. Yeah, a good week of practice when he was in there. I feel good with where he is at right now."
He added: "I know what we're doing. I just don't feel like telling you right now.
"I'm not deciding Sunday morning. We don't have any practice left. I know where Jimmy's at today. I know where Trey's at. I know where our team is at and I feel pretty good about where we're at, so I'm excited to get to Sunday. I am really glad I don't have any press conferences after today.
"I think you guys understand why you don't announce it. But regardless, especially with Trey playing last week, we've got two guys here with some experience that our team feels good with and we'll see how it plays out."
San Francisco's Pro Bowl left tackle Trent Williams has not practiced all week and is listed as questionable. In the secondary, cornerback Emmanuel Moseley is expected to return from an ankle injury while rookie corner Ambry Thomas came off the reserve/COVID-19 list.
Corners K'Waun Williams, Dontae Johnson and Deommodore Lenoir and starting free safety Jimmie Ward remain on the COVID-19 list, though both Shanahan and general manager John Lynch have expressed confidence more members of their secondary will be activated off the list on Saturday.