The Celtics are getting some help at point guard this week.


Boston yesterday inked Carlos Arroyo to back up Rajon Rondo. It's not the biggest signing ever ("We just needed another guard," Doc Rivers said), but it is significant. And here's why:


Arroyo last played for the Miami Heat. He played point guard for the Miami Heat.


Nobody knows an offense better than a point guard.

And no offense is more important for the Celtics to know than Miami's.

Arroyo will offer what he offers on the court -- enough to spell Rondo, and not much more. That's fine.

But he will bring with him an intimate knowledge of Boston's greatest Eastern Conference challenger. That will prove absolutely invaluable in their inevitable conference finals clash.

Familiar name

No offense to Carlos, but he's hardly the first Arroyo we think of here in Boston.

That honor belongs to -- and will continue to belong to -- Bronson, late of the Red Sox starting rotation.

You might remember him from three decent seasons, totaling a 4.19 ERA and a 24-19 record over 73 regular-season appearances. But more likely, you remember him from this.

Another local tie

Arroyo played for Puerto Rico in the 2007 FIBA CBC Championship tournament. One of his teammates was Jose Juan Barea, the Northeastern standout currently with the Dallas Mavericks.