With a quarter of the season now behind us, there are just two undefeated teams remaining in the NFL: The New England Patriots and, yes, your San Francisco 49ers.

Kyle Shanahan and company face what is likely their greatest test of the season Sunday when the team travels to the Los Angeles Coliseum to take on the reigning NFC champion Rams. 

Rookie defensive end Nick Bosa had his coming out party on "Monday Night Football" this past week, sacking Cleveland Browns quarterback Baker Mayfield twice and amassing four tackles, five total QB hits, as well as forcing and recovering a fumble.

The Rams had an extended week after losing on "Thursday Night Football" in Week 5 to the Seattle Seahawks.

[RELATED: Kittle deemed questionable for 49ers-Rams NFC West clash]

Here’s how you can watch 49ers-Rams:

Start time: Sunday, Oct. 13, at 1:05 p.m. PT
TV channel: FOX
Live stream: fuboTV -- Get a free trial