It's nearly Christmas and the 49ers have yet to punt in the month of December -- and they may have to keep that up to claim the NFC's top spot.

Brock Purdy delivered a statement performance on Monday night, adding another defining moment to his growing resume with the 49ers.

This article was originally published on www.si.com/nfl/49ers/onsi as How Brock Purdy's Return Has Shifted the 49ers' Locker Room Dynamic. San Francisco 49ers quarterback Brock Purdy’s return after an extended absence due to turf toe has sparked widespread debate.

Something Purdy had in common with 44-year-old Philip Rivers on Monday — mental sharpness, which came in handy in a big Monday night win.

As they prepare for their upcoming matchup, attention has shifted not only to the playoff race in the NFC West but also to the presence of veteran quarterback Philip Rivers on the other sideline, a player whose return to the field has drawn admiration from both Brock Purdy and Kyle Shanahan.

LeSean McCoy revealed that a San Francisco 49ers wide receiver told him that they like playing with Mac Jones more than Brock Purdy.