The 49ers’ defensive scheme
On Wednesday, ESPN.com’s Mike Sando wrote a blog theorizing the 49ers could switch from a 3-4 defense to a 4-3 defense at some point in the distant future. With all due respect to Sando, the 49ers’ defense already is a 4-3 defense. They just use 3-4 personnel. First of all, the 49ers use a classic four-man defensive line more than 65 percent of the time, in their sub packages. On base…