https://www.49ers.com/news/what-sign...-49ers-defense
https://www.ninersnation.com/2019/3/...ee-agency-2019
https://ninernoise.com/2019/03/11/kw...mpact-defense/
Ourlads hasn't been relevant since 2017. In 2018 I found never ending mistakes on thier website and even today in 2019 they're far behind in transactions (players on their depth charts that were cut back in February) and haven't transitioned all the new defensive schemes yet.
Don't get me wrong, Ourlads is a good starting point, but they're far from accurate. CBS Sports last year was the most accurate I found but even they had problems.