The Bruins should take a look at these four free agents

With the preseason knocking down every door in the National Hockey League, some teams are realizing they are running out of time to fill gaps on their roster. For the first time, in a long time, the Boston Bruins are one of those teams.

With Patrice Bergeron and David Krejci making the decision to hang up the skates before the season, the Bruins are left with the, virtually impossible task of replacing them before the season starts.

Both players left an indelible legacy in Boston, both on and off the ice, but their play-making ability is what really is left to be desired. Boston is still looking for someone to take their place on the top two lines.

Bruins General Manager, Don Sweeney has explored trades for players like Elias Lindholm, and head coach Jim Montgomery has even said they would be fine if the top two role was taken by Charlie Coyle and Pavel Zacha.

What Sweeney, and the rest of the brass have not done, is look at the remaining free agents. Here are three free agent centers that Boston should look at before the season starts.