With Cueto apparently signing with the Marlins (huh?), you would have to think that one of their starting pitchers would be on the move now. They have Eury Perez on the horizon too.
I would really check in to see what they want for Trevor Rogers. With the Jays having 4 righty starters (Manoah, Gausman, Berrios, Bassett) all here for the next 3 seasons, I think he could be a fantastic fit as a LH #5 as buy lower candidate. I know the Marlins have more tantalizing arms than him, but he is a lefty arm under team control for the next 4 years, and he would not have to come in pitching like a mid rotation starter - he would just have to be a solid #5. This would raise the floor of the starting rotation.
He is 25 and one season removed from a season that saw him put up 3.5 WAR and 160 ERA+ with a 2.55 FIP. And he would provide insurance in case Berrios struggles again this season. In addition, this would allow Tiedemann more time and would not tempt the Jays into rushing him to the show in the even that neither Kikuchi nor White grab hold of that #5 spot.