49ers report card: Mental miscues lead to another loss

MIAMI GARDENS, Fla. — Here is how the 49ers (6-9) graded in Sunday’s 29-17 loss to the host Miami Dolphins (7-8):

PASS OFFENSE: B-

George Kittle (106 yards) and Deebo Samuel (96 yards, touchdown) flashed vintage form. Kittle is within 33 yards of a 1,000-yard season, and tight end screens should have been used more this year. Brock Purdy’s attempt to deliver in the clutch instead saw him throw an interception inside the final two minutes to seal Loss No. 9 for the 49ers, who were...