As far as actual building blocks, the right answer is Brock Purdy. Purdy is not quite on his rookie salary, but that is because the 49ers extended him early. He is young, and he is the future. More than that, his salary means he is the building block.

San Francisco 49ers head coach Kyle Shanahan has an injury situation to deal with, involving star offensive tackle Trent Williams.

The San Francisco 49ers received a timely boost as they prepare for a critical showdown against the Seattle Seahawks. With playoff positioning and NFC West stakes looming, all eyes were on Christian McCaffrey’s status after his name surfaced on the injury report earlier this week.

The good news for the 49ers is that they already have clinched a playoff spot. The bad news is that it's going to be extremely difficult for them to get the No. 1 seed without Kittle, because Brock Purdy is a completely different quarterback when Kittle isn't on the field.

Receiver and Pro-Bowl returner Rashid Shaheed, who exited last week's game with a concussion, has been cleared to play in the Seahawks' Week 18 game against the 49ers.

Given the offense’s continued success with or without their offensive stars, Shanahan deserves kudos for his whiteboard wizardry. Not to be outdone, defensive coordinator Robert Saleh has also shown his chalkboard brilliance by working around the absences of standouts Warner and Bosa to field a competitive defense.

The San Francisco 49ers have one game left in the regular season, but they've already made the playoffs. Here's what could be their downfall.

Maxx Crosby trade rumors are heating up. We break down his impact on the Raiders and the chances of the San Francisco 49ers trading for him.