Lamb and Walked each had 16 points, Alex Oriakhi chipped in with 12 points and 10 rebounds, and Roscoe Smith also donated 12 points for the Huskies (16-2), who took their fifth straight win.
Smith's 3-pointer with 8 minutes left put the Huskies up 55-51 and ignited a 14-3 run that put the game away, capped by Lamb's jumper with 3 1/2 minutes remaining.
The Volunteers (12-7) got 15 points, six rebounds and five assists from Melvin Goins in a game that marked the brief return of head Coach Bruce Pearl to the bench.
The Southeastern Conference suspended Pearl for Tennessee's first eight conference games of the season, as well as its next four. But because Saturday's game was a non-conference contest, Pearl was allowed to coach the Vols.