Parsons originally injured the knee when he took a hard foul during Sunday’s loss to the Indiana Pacers, when he scored 27 points. He recorded 22 points and six assists, including 13 points in the fourth quarter of Wednesday’s win over the Oklahoma City Thunder despite the soreness.
X-rays on the knee taken at the American Airlines Center were negative. Parsons will be further evaluated on Friday.
"It's pretty swollen and sore behind the knee," Parsons told ESPNDallas.com. "It's been sore for a few days now, but I thought I could get through tonight."
The knee was clearly bothering Parsons more in the second game of the back-to-back. He was limping noticeably throughout the game against his former team.
"He tried to give it a shot tonight," coach Rick Carlisle said. "He gave it a real shot, but he just wasn't moving right and he was having some discomfort, so we pulled him."
Parsons, who had 11 points, three rebounds and four assists in 26 minutes, also exited early due to injury in the Mavs’ last game against the Rockets. He missed the next seven games due to a left ankle sprain and bone bruise.