Jaylon's not disinterested.
Not many inside 235 LB's in today's league step up and take on the running 310 lb guard, anchor him, keep the outside hand free and then slide off to make the play. Those days are over unless you have 265 Rolando McClain size. They all use speed and Jaylon is no exception.
Based on the guard's movement on this play Jaylon's job was to take away the outside and force the RB to the inside for the Will to make the play which he did, same with Joe Thomas. This was Covington's and LVE's play to make. LVE was late to the hole... terrible.
There is a reason that LVE was late moving to the outside.
The Cowboys LBs have been getting boxed out from moving side to side on zone running plays by an OLineman coming out to block them.
This has been a problem since the Rams playoff game and is scheme related with regards to why an OL is in place to make that block.
Look at the image below and notice LVE, the OL coming to block him and the RB.
If LVE was more to the outside at the point shown in this image, the RB would cut back inside and the OL would box LVE out from getting back to the inside.
The 2nd image shows where LVE
could have been if he had shot to the outside.
- I didn't move the OL but he likely would have been closer to LVE than shown if LVE was in that position.