The line-up, if you must know, is:
Theodore, Semin, and Backstrom: guitars
Brooks Laich: bass
Mike Green: drums
Puck Daddy has a million priceless details here. I have to say Semin looks amazing.
The instrument choices are interesting. To be honest, I've always thought of the goalie as the drummer, the defense as the bass player, the center as the guitarist, and the wingers as vocalists. Though sometimes the center can be the lead singer and the wingers can be the guitarists (like, say, on the Sharks or the Bruins). Sometimes the winger is a keyboardist (Martin St. Louis).