49ers grades for Brock Purdy’s three-touchdown effort in Week 15 win over Titans

The 49ers’ fourth consecutive victory was not exactly a thing of beauty.While the win lacked style points, it was decisive enough to avoid too many uneasy moments.Quarterback Brock Purdy and the 49ers’ offense kept things on track in a 37-24 victory over the lowly Tennessee Titans on Sunday at Levi’s Stadium.The defense has plenty to address coming out of this game, as they prepare this week to face Philip Rivers and the Indianapolis Colts on Monday Night Football.Here is the report card from the 49ers’ Week 15 game against the Titans:Rushing offenseThe 49ers still have not been able to generate the kind of traditional rushing attack for which they’ve been known during the Kyle Shanahan era.Christian McCaffrey rushed for 73 yards on 22 carries for a 3.3-yard average. He scored on a 1-yard touchdown run in the second quarter.Purdy provided the 49ers with a spark on the ground with 44 yards on seven rushing attempts. His 26-yard scramble was San Francisco’s longest run of the season.Grade: B-minusPassing offensePurdy took advantage of the Titans’ defensive deficiencies to string together five consecutive scoring drives to open the game.The...