Find a way to keep them is exactly how a salary cap works, yep it's that simple..
In 2016 Franchise Tag for DE was 15.7M, if Jernigan were to put together a Pro Bowl season next year the franchise tag would cost about that amount above. Perhaps a long term deal could be 13-14M/yr.
If Jernigan has an average year at minimum I'd assume he'd get over 10M/yr similar to what the Steelers paid C.Hayward or the 9M broncos paid Wolfe.
Mosley will get a 5th year option picked up, but the team needs to try and sign him to long term deal early, before they have to pay him more than kuechly
And Stanley is only in year 2 of his rookie contract so he's irrelevant to this particular conversation currently.
Like my original comment said B.Will is a valuable player I like him a lot, but people cried when they let Ngata walk away thinking B.Will wasn't ready to replace him he's done well. I think Pierce could have done something very similar..
Sam Adams & Ted Washington have to be sick to their stomachs that they aren't playing now lol.