Cleveland Browns quarterback Joe Flacco throws a deep pass pass under the protection of Cleveland Browns guard Wyatt Teller in the second half. John Kuntz, cleveland.comCLEVELAND, Ohio — The Browns offense was not good during Sunday’s 34-10 loss to the Lions. Here’s how the offense graded according to Pro Football Focus:(PFF grades every player on every play and uses a scale of 0-100, with higher grades indicating better play. PFF has explained its grades this way: 100-90 elite; 89-85 Pro Bowler; 84-70 starter; 69-60 backup; 59-0 replaceable. In other words, it’s similar to how we would match up percentages with traditional letter grades in school.)