‘The proof is on film every week, even deep into the playoffs. No one in the NFL caught more balls for more yards than Diggs did during the regular season: 127 passes for 1,535 yards. No one has caught more balls for more yards in the playoffs: 14 for 234 more yards in Buffalo’s two victories. Last year, Buffalo ranked 24th in the NFL in total yards and 26th in passing yards. This year, the Bills were second and third, respectively. The improvement of third-year quarterback Josh Allen is a significant factor. But Diggs’s arrival changed what the Bills could do on offense.’