T.J. Sapp hit four 3-pointers and finished with 14 points for the Tigers (8-6), who closed the game on a 20-11 run in the final eight minutes. Booker added seven rebounds and four blocked shots.
East Tennessee State (5-7) took a 47-46 lead on Sheldon Cooley’s jumper with 7:44 to go. The Tigers responded with a Sapp 3-pointer and a Booker dunk, giving Clemson a 51-47 advantage with 5:49 to go.
Andre Young stretched the lead to 56-49 with a 3-pointer with 2:27 to go. Young just missed a triple double, scoring 12 points to go with eight rebounds and seven assists.
The Buccaneers led 39-30 three minutes into the second half on Jarvis Jones’ 3-pointer. Clemson crawled back, taking a 44-43 lead on Young’s 3-pointer with 11:47 to go.
Adam Sollazzo led East Tennessee State with 27 points. Tommy Hubbard scored 19 points with eight rebounds.
Clemson opens ACC play Saturday, hosting Florida State.