If one was to ask an observant San Francisco 49ers fan whether or not the team's offensive line was good or not, the answer would probably lean pretty far toward the negative.
However, at least according to Pro Football Focus' analytics heading into Week 5's Thursday Night Football showdown between the Niners and Los Angeles Rams, head coach Kyle Shanahan's O-line is actually, well... pretty good.
PFF ranked San Francisco's O-line sixth best after four weeks (yes, you read that correctly).
This, despite the 49ers boasting one of the NFL's worst rushing offenses while being forced to start a rookie seventh-round left guard, Connor Colby, and not getting All-Pro kind of play from future Hall of Fame left tackle Trent Williams.