Based on the (poor) quality of the defense, I would say our guys are tired. No one on the bench to soak up Al and Smart's minutes.
It's really a shame the Western Conference got the Wednesday game. DAL is going to be nice and rested up after their 7 game series, while we lost Smart and Al at the last second. Smart would have likely been back for a game tomorrow. And, yeah, I get Al would be gone anyway, but it may the difference between him missing 2 games and 3 games. Also, maybe he never gets tested if they wait another day.