I totally believe it. Leonhard played under Ryan or a Ryan disciple, Pettine, for almost all of his career from 2008-14.
Two are starters, Incognito and Wood (if Incognito sticks around), and neither is remotely a problem. Who's the third? Urbik? Having a 30-something depth player isn't an issue. Again, the two youngest starters on the line are the weakest links.