What you need to know before Celtics preseason begins

Celtics guard Marcus Smart and forward Al Horford (42) vie for a loose ball during training camp.COMMENTARY

You’ve been busy this summer.

The only thing hotter than the temperatures has been the Red Sox, so Celtics-every-day folks like me understand that you might not be familiar with what’s been brewing behind the scenes. The Celtics essentially got the band back together for another run, which means they’ll be really good. It doesn’t mean things are perfect, though.

With training camp around the corner, it’s time to get you caught up.

Wait, where’d he go?

Point guard Shane Larkin was a spark plug last season, and his shoulder injury might have been the breaking point that cost the Celtics a…