Larkin averaged 14.5 points, 4.6 assists, 3.8 rebounds and shot 40.6 percent from the 3-point line last season, when Miami won the Atlantic Coast Conference and advanced to the Sweet 16 in the NCAA Tournament.
In a regular-season win over top-ranked Duke, he scored 18 points, grabbed 10 rebounds and handed out five assists.
Larkin does not turn 21 until Oct. 2. He opened eyes of NBA scouts in Chicago recently when his vertical leap was measured at 44 inches second-best in the history of the combine.
This week, reports surfaced that Boston hopes to draft Larkin as a backup to All-Star point guard Rajon Rondo. The Celtics own the 16th pick in the draft two spots behind the Jazz.
Other players participating in Wednesday's workout include North Carolina State guard Lorenzo Brown (6-5, 190), North Carolina forward Reggie Bullock (6-7, 205), North Texas forward Tony Mitchell (6-9, 236), Oklahoma forward Amath M'Baye (6-9, 208) and Nevada guard Malik Story (6-5, 215).