Toppin will be a free agent after this season and the Pacers have a logjam at forward after trading for Pascal Siakam.
With rookie Jarace Walker also on board, Toppin's future is hazy in Indiana and they would like to get something from him before he leaves in free agency.
The Pistons could wait until then, but Toppin will be a restricted free agent, so that would tie up money if they made him an offer and they may have to give more as Indiana would have the right to match any deal.
Toppin isn't a volume 3-point shooter, but he's hitting 39 percent of the ones he does take and hitting over 70 percent from 2-point range, which leads the NBA. He's still only 25, so just entering his prime and is the type of athletic, floor-spreading power forward the Pistons need.
Given his contract status, he shouldn't cost much and there may be a deal there for the Pistons to flip one of their expiring deals for him to get the inside track on his free agency.
Of course, he could just walk after the season, so there would need to be some mutual interest there to give up assets for him instead of just waiting.