A 6-foot-5 junior, Clarkson averaged 17.5 points, 3.8 rebounds and 3.4 assists per game this season, his only one with the Tigers after transferring from Tulsa after his sophomore year.
Clarkson, who can play either backcourt spot, is projected as a late first-round pick, according to Goodman.
He shot 83 percent from the free-throw line this season, but his three-point shooting needs some improvement, as he shot only 28 percent from long range.
His teammate, redshirt junior Jabari Brown, who led Missouri in scoring this season at 19.9 points per game, is expected to decide whether he'll return to school this week, Goodman reports.
The Tigers finished 23-12 this season and 9-9 in the SEC. Their season ended after a loss to Southern Miss in the second round of the NIT last week. SI WIRE: Report: Xavier's Semaj Christon to enter NBA draft