San Francisco 49ers quarterback Mac Jones went down hard in the third quarter of a Thursday night game against their division rival Los Angeles Rams, but how severe was it?

INGLEWOOD, Calif. — San Francisco quarterback Mac Jones played with an obviously injured left knee against the Los Angeles Rams on Thursday night, persevering to pass for 342 yards and two touchdowns ...

Some people feel there is a brewing quarterback controversy for the 49ers between incumbent Brock Purdy and backup Mac Jones.