No actually there is zero chance that happens. Lebeau has never put 3 DLs on the field on passing downs. Just because you can dream it, doesn't mean it will happen.
If Jarvis isn't getting the job done, you will see either Arthur Moats in his place or you will see Lebeau moving the chess pieces around (he'll do that in any event) and have Shazier come off the edge with Jarvis dropping to the middle etc.