School officials had indicated Hubbs was doubtful for the Butler game after he underwent the procedure on Dec. 1. Tennessee coach Rick Barnes updated Hubbs' situation Thursday by saying the 6-foot-4 junior ''is making good progress, but he's not going to be ready for this one.''
Barnes didn't know when Hubbs might return to action. Hubbs is averaging 15.3 points and 3.7 rebounds per game for Tennessee (4-3).
The trip to Butler (7-1) ends a 13-day break from games for Tennessee, which represents the program's longest layoff during a season since December 1967.