The point guard was in the midst of a superb season for the Hornets and was a leading candidate for NBA Rookie of the Year honours.
Sad thing,hornets said in a release earlier on Sunday that Ball had an MRI exam in San Antonio which revealed the injury - and would be listed as out indefinitely.
Ball appeared to be hurt after a fall in the Hornets 125-98 loss to the Clippers in Los Angeles on Saturday, and he appeared to be in discomfort playing in the second half.