I'm pretty sure the Blue Jays didn't sign Corbin because they wanted him. They were likely desperate since their team, especially their starters, are largely on the IL. I'm not sure if there is another starter out there currently that the Jays could have signed that would be better. If he can limit the Twins to just the three runs, he did his job keeping the Jays in the game with the hope that the offense can bail him out.