2009–10 ACC men's basketball standings
	Conf				Overall
Team	W		L	PCT	W		L	PCT
#3 Duke †	13	–	3	.813	35	–	5	.875
#20 Maryland	13	–	3	.813	24	–	9	.727
Florida State	10	–	6	.625	22	–	10	.688
Virginia Tech	10	–	6	.625	25	–	9	.735
Wake Forest	9	–	7	.563	20	–	10	.667
Clemson	9	–	7	.563	21	–	11	.656
Georgia Tech	7	–	9	.438	23	–	13	.639
Boston College	6	–	10	.375	15	–	16	.484
Virginia	5	–	11	.313	15	–	16	.484
North Carolina	5	–	11	.313	20	–	17	.541
NC State	5	–	11	.313	20	–	16	.556
Miami (FL)	4	–	12	.250	20	–	13	.606

† ACC Tournament winner As of March 19, 2010; Rankings from AP Poll

The 2009–10 Clemson Tigers men's basketball team represented Clemson University in the 2009–10 college basketball season. Their head coach was Oliver Purnell. The team played its home games at Littlejohn Coliseum in Clemson, South Carolina and are members of the Atlantic Coast Conference. All games were produced and broadcast locally by the Clemson Tigers Sports Network. The Tigers finished the season 21–11, 9–7 in ACC play. They lost in the first round of the 2010 ACC Men's Basketball Tournament. They received an at-large bid to the 2010 NCAA Men's Division I Basketball Tournament, earning a 7 seed in the East Region, where they lost to 10-seed Missouri in the first round.

On Wednesday, May 27, guard Terrence Oglesby announced he would forgo his final two seasons at the school to pursue a professional basketball career. Oglesby appeared in 66 games and scored 777 points in his two seasons at Clemson. Previously, Oglesby played for Norway at the International Basketball Federation (FIBA) FIBA Europe Under-20 Championship. In a press release issued by Clemson University, Oglesby indicated that his time spent playing internationally helped fuel his decision to turn pro. Oglesby's departure left an open roster spot which was filled by the commitment of shooting guard Noel Johnson, a former USC commitment.

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