I would assume that you are running a 3-4 Defense. Your user looks to be pretty slow. For just 15 cap, you can upgrade your Roquan to the PU blitz 90 overall. He would then have a base speed of 89 instead of 86, and be able to get sprinter.
3-3-5 is the defensive meta currently, and that allows you to sub in a SS or FS in at linebacker. If you dont want to switch, getting the Ultimate Legend Physical Urlacher is a good user option for you.