Marcus Smart out (leg) for road trip to Brooklyn and Atlanta

Depth is a strong suit for this group of Boston Celtics, and it will be tested again for at least these next two games:

Smart injured his leg during the second half of Friday's blowout win over Brooklyn:

Is it time to be concerned over Smart's injury history? The Celts point guard was out for three games earlier this month with a toe issue. Add these two setbacks as well as the finger problems he had this summer and the scary ankle injury that caused Smart to miss 10 games last season and you can argue that it is becoming a problem. For a guy that utilizes his speed to dominate on the defensive end, injuries to his legs are reason to be worried.

Follow Rob Welch on Twitter @CelticWelch