Furthermore, the server name is not, in this case, a parenthetical expression: it would be if the server had already been identified or in some way presented and we would only be here specifying its name. Let’s say I’m talking about my brother (yeah, him again); after a while, I could say something like “Then my brother, John, got up and left.” “John,” here, would be parenthetical. But if I had been talking about more than one brother, to identify him, I would say, “Then my brother John got up and left.” Then again, I could also say, “Then one of my brothers, John, got up and left.” “John” can be parenthetical here, since I’m not using “the” but “one”. In that sense, “LeSabre” could only be parenthetical if they had said, “One of our servers” or “A server”.

(Note that commas can also be used when introducing a quote.)