I missed the game. Reading up, it sounds like this was a pregame lineup adjustment. Hinch mentioned seeing how things were today, so hopefully it was just a one off. I don't recall anything from Thursday's game, but who knows.
Taking Carpenter and Canha out is too much for this lineup to bear. If the Tigers really wanted to evaluate young talent, I would think there is an opening for Malloy now. Carpenter's injury sounds ripe for a 60 day IL stint, so that would create an opening on the 40 for Malloy. I'm going with the assumption they're at 40, but I don't know that for sure.
A Canha injury would also likely eliminate any thoughts of demoting Torkelson, if there were any of those thoughts to begin with. Urhsela played 1B last night, Vierling has some limited experience there, too. I get Torkelson has disappointed so far this season, but I'm not sure a Vierling/Urshela time share at 1B is what they'll opt for, particularly since they are much better gloves elsewhere.