Penguins Update: Centers of Attention

What do Brian Boyle, David Desharnais, Sam Gagner, Martin Hanzal, Dominic Moore and Joe Thornton have in common?

If you answered all were free-agent centers who recently signed with other NHL teams, you’d be correct.

Indeed, the days slip by. And the list of external candidates to fill the Penguins’ vacant third-line center spot keeps dwindling.

The latest to be scratched from the list? Montreal’s Alex Galchenyuk. The 23-year-old Milwaukee native signed a three-year deal yesterday with the Canadiens worth $4.9 million per season.

While the Pens still appear to be in the hunt for Colorado’s Matt Duchene, talks for now have cooled. In fact, GM Jim Rutherford hinted yesterday that he could be…