Hawks center Al Horford didn't return for the second half after he was bothered by a sore right calf. He had four points and two rebounds in 14 minutes.
Nowitzki, an 11-time All-Star, could miss the next six weeks with a right knee injury. Kaman, who signed as a free agent in July, is out with a strained right calf muscle.
Both forwards are expected to decline their 2016-17 player options, so they can join the market on July 1.
The NBA's 10 most valuable postseason players include new stars and some of the game's greats. David Thorpe has the full rankings, including LeBron James, Kawhi Leonard and Dwyane Wade.
The contract signed by Pacers head coach Frank Vogel expires in June.