Grading 49ers’ offense, defense in throttling of Cowboys

SANTA CLARA — Where do the 49ers go from here? Here's some advice to 49ers fans: Don't worry about that part of it; and just enjoy what has turned into weekly masterpieces of offensive efficiency and relentless defensive aggression. The 49ers took the fight to the Cowboys on Sunday night, and Dallas could not keep up. Quarterback Brock Purdy orchestrated an impressive offensive performance, and the defense came up with four takeaways and four sacks in a 42-10 victory over the Cowboys at Levi's Stadium. "He was really good," 49ers coach Kyle Shanahan said of Purdy. "Everybody was pretty good." Get ready to read a report card that might even be better than the previous four. Here are the grades from the 49ers' Week 5 win over their long-time rivals: Rushing offense Christian McCaffrey extended his streak to 14 consecutive games with at least one touchdown from scrimmage, taking care of that matter in the second quarter with a 1-yard touchdown plunge. He finished with 51 hard-earned yards on 19 rushing attempts. Jordan Mason got into the act with a team-best 69 yards and a touchdown on 10 rushing attempts. The 49ers rushed for 170 yards on 41 attempts. The only blemish on the...