Charles Barkley's most embarrassing week in the NBA may be his last this season.

Barkley, a source of controversy all week because of a spitting incident, tore a ligament in his left knee Sunday when teammate Rick Mahorn fell over him in the third period of Philadelphia's 110-101 victory over the Cleveland Cavaliers.Team doctor Jack McPhilemy said the injury, which he called a second-degree tear, could end Barkley's season. A more definitive prognosis was expected after tests today, he said.

The game was tied at 68 when Barkley left the floor with 18 points and 12 rebounds.

"Charles leaves a big void," teammate Armon Gilliam said. "It's not a good situation, but we've been through it before. He means so much for the team."

"Hopefully, Charles won't be out too long," Hersey Hawkins said. "The rest of us have to pick up the slack. I don't think we responded too well last time."

"It is difficult to deal with, given what we've been through this season," Ron Anderson said.