It’s easy to forget that the 49ers were awful last season, going 4-12 and earning the second pick in the NFL Draft. To the extent you remember that San Francisco was bad last year, it’s probably because you see All-World rookie defensive end Nick Bosa dominating the league this season, and the 49ers drafted him with that second overall pick.
But otherwise, it’s hard to fathom that the dominant, 7-0 49ers, were actually terrible last year. Those 49ers allowed 27.2 points per game and scored 21.4 points per game, a difference of 5.8 points per game. This season, San Francisco is averaging 29.6 points per game and allowing just 11.0 through seven games, a difference of 18.6 points per game and an improvement of 24.4 net points per game.
That’s… a lot. In fact, it’s the third most in the NFL since 1950, trailing only the 2013 Chiefs (who added HC Andy Reid and ex-49ers QB Alex Smith in the offseason) and the 1999 Rams (who added QB Kurt Warner, RB Marshall Faulk, and WR Torry Holt in the offseason to form the GSOT offense). San Francisco has been helped by having QB Jimmy Garoppolo back, of course, but the team has mostly been aided by a dominant defense.
The graph below shows the points differential for each team since 1950 on the X-Axis, and that team’s points differential through 7 games the next season on the Y-Axis. I’ve colored in four of those dots: at -5.8, 21.6 are the ’98-99 Rams; at -5.8, 18.6 are the ’18-19 49ers. Over to the left at -13.4, 12.6 are the 2012-13 Chiefs, and at the top of the chart are the 2018-2019 Patriots, who jumped from a +6.9 points differential to a +25.0 points differential through 7 games. [continue reading…]