Why cant we keep both? If we stay in a 3-4, Jackson will get playing time. He played some snaps inside, and Kerrigan played some snaps at "end," which is when we could line Jackson up outside. Jackson has shown to be relatively strong at pass coverage. If we got 4-3, then chances are Kerrigan and Rak would potentially spend a lot of time with their hand in the dirt, and Riley would presumably be playing middle. Fletcher retiring opens up a lot of playing time for Jackson, and I think he's better in space then Rak.