Farmstros has a little post on what various future Astros like to be called.
You can click for yourself, but the one we will not take note of is Shuck's preference to be called "J.B." Because I liked The Darkness (and, on occasion, still do). They have a song called Black Shuck, which will melt your face, and because Jack Shuck is close enough to that to make me chuckle, Jack Shuck he shall be.