According to Rod Boone of The Charlotte Observer (Twitter link), Ball was stepped on by teammate P.J. Washington, which apparently caused the sprain. Ball went back to the locker room before being ruled out.
Unfortunately, this is the third time Ball has sprained his left ankle in 2022/23. His first ankle injury occurred during a preseason game on October 10 and he was diagnosed with a Grade 2 sprain the following day.
Ball missed the first 13 games of the regular season with the injury, then re-injured his ankle in his third game back on November 16. He missed an additional 11 games while recovering from the second sprain before returning to action last month.
A first-time All-Star in ’21/22, Ball is putting up big numbers in his third season, averaging 24.0 PPG, 5.4 RPG, 8.4 APG and 1.1 SPG on .415/.374/.870 shooting through 21 games (34.8 MPG). The Hornets have struggled both with and without him, however, as they’re 6-16 in games he’s played and 6-18 when he hasn’t, for an overall record of 12-34.