The Blues depth chart at centre shows: Backes Jaden Schwartz Sobotka Andy McDonald Steen and Berglund (I believe) can take regular turns in the middle. That ain't no great hell, right there. If you want to offer them something they need, it had better include a centre. Schwartz has a bright future, but at 5'10, he's never going to be their #1. As much as I like Couturier, that might be your carrot (plus someone). The return better be a top pair d-man, though. If I could get Pietrangelo back, I would trade any centre except Giroux.