SAM FARMER Los Angeles Times The Los Angeles Times’ NFL writer, Sam Farmer, examines this week’s matchups. Lines according to Fan-Duel Sportsbook (O/U = over/ under). Last week’s record 3-1 (.750). Overall for playoffs, 6-4 (.600). Using point spreads with the scores Farmer predicted, the record against the spread last week would have been 0-4. Overall, 4-6 (.400). TV channels are for Los…