Using an outlier in a category as a counter to a statement about the group as a whole is an error. It is also an error with respect to most statements about an individual within that category. Imagine that we are talking about a one handed baseball player named X. Someone says that is a problem and he probably won't make the majors. You reply, "Pete Gray and Jim Abbott made it." That would be a logically correct rebuttal if and only if someone had been saying "No one handed player can make the majors." It does not, in fact, say anything about player X, beyond that it would be wrong to state that there is no possibility he can make the bigs. The general probability of X making it to the Show are influenced by a host of other factors, including the record of the category as a whole.
I have not stated nor do I believe that Bracco has no chance of making the Leafs or the NHL in general. I think what I stated earlier, that there are questions not just about his size, but his defensive play and his top end speed. Saying that Marner made it is irrelevant for a series of reasons.