The 49ers defense was OK in 2015, but there was loads of opportunities for improvement. The defense ranked 27th in passing defense, and had the fourth-worst number of sacks (28), where only the New York Giants, Buffalo Bills, and Atlanta Falcons had fewer sacks.
Having a good defense is critical in today’s NFL. The 49ers were successful in 2011-2013 because they had a league top-5 defense. The two teams in this year’s Super Bowl, the Denver Broncos and the Carolina Panthers, have the No. 1 and No.