Matt Chapman would be a nice target and would clearly improve the infield defense. The issue is fit. Adding Chapman would likely force Okamoto to move to DH, which means the Jays would either have to bench Springer more often or play him in a corner-outfield spot. Unless they are comfortable with that kind of roster shuffle, I don’t see Chapman as a particularly clean fit.
I’d also be open to bringing back Robbie Ray, but I’m not sure he’s a major upgrade over Corbin. That said, if the acquisition cost were minimal, he would raise the floor of the rotation for the rest of the season and provide useful insurance in case of another injury.
The rotation already looks pretty solid with Cease, Gausman, Bieber, Yesavage, and Corbin as the No. 5 starter, plus SWR, Miles, and Scherzer as depth options. If the Jays do decide to add another starter, I’d rather see them target a more meaningful upgrade. Otherwise, adding an elite arm to the bullpen might be the better use of resources.