That sounds about like the Giants situation as well with Tae Davis et alHewitt is the starter. Most articles have Cashman as the better coverage guy so it's still pretty murky, which generally means neither will be a true 3DLB.
https://jetswire.usatoday.com/2019/08/30/blake-cashman-is-jets-wires-preseason-week-4-player-of-the-game/