The 49ers collapsed in the second half of their first game of the season, falling 19-10 to the Bears. After dominating in the first half, San Francisco led just 10-0 early in the third quarter and left the door open for Chicago to counter.
Here are position-by-position grades for the Niners' performance:
Quarterback: D+
I had Trey Lance down for a D at the end of the game but knocked his grade up slightly because of the weather conditions. Lance's final line was horrible. He finished 13-for-28 with 164 passing yards and an interception alongside 13 carries for 54 yards on the ground.