Van Gundy said Caldwell-Pope has some muscle irritation and there is no timetable for his return.
Caldwell-Pope was injured when he slipped on a wet part of the floor at the Verizon Center in Washington D.C. in the third quarter of Sunday’s 91-89 preseason loss to the Washington Wizards. He played 25 minutes and had 12 points before being injured and was helped of the floor after not being able to put weight on his left leg.
Caldwell-Pope was averaging 16.6 points in three preseason games and led all scorers in this season's Orlando Summer League.
Caldwell-Pope was Detroit’s first-round selection, 8th overall, in the 2013 NBA Draft. He averaged 5.9 points, two rebounds in 80 games last season in his rookie campaign.
The Pistons start the regular season on the road against the Denver Nuggets on Oct. 29.
- Scooby Axson