The fullbacks are Leigh Halfpenny, Stuart Hogg, Rob Kearney, Tommy Bowe, Alex Cuthbert, Sean Maitland and George North.

WSJ: Lions Reflect Welsh Success

Fullbacks have largely been replaced by tight ends and other receiving threats.

WSJ: 3 Ways to Watch the Super Bowl

And then Wenger highlighted the work of Bayern's fullbacks, Philipp Lahm and David Alaba, who brought the ball out of defense just as well as they won it back.

WSJ: Bayern Munich's Tough Manager Call

Spence said that he quickly realized that teams run much less than they used to and when they do run, "teams aren't running power and leads with the fullbacks, " he said.

WSJ: NFL Players: Tired of Being Fat

The wingers play like wingers, not like adjunct fullbacks.

WSJ: Euro 2012: In Greece, A Weekend of Goals and Polls

One of the top-rated fullbacks in the nation.

WHITEHOUSE: The Commander in Chief Trophy

Baltimore quarterback Joe Flacco is going to spend a lot of time handing the ball off to running back Ray Rice and watching him try to follow one of the NFL's last fullbacks (Vonta Leach) through the San Francisco defense.

WSJ: Viewer's Guide: Three Ways to Watch the Super Bowl