Markkanen is leaving Arizona following a tremendous freshman season, where he averaged 15.6 points and 7.2 rebounds a game, and helped lead the Wildcats to a 32-5 record.
"Lauri is as elite of a shooter as you'll find at 7-feet outside of the NBA," Scout national analyst Josh Gershon said.
"He's not just a shooter," he added. "He can put the ball on the ground, finish around the basket, is a plus athlete for his size and is an improved shot blocker with rebounding upside. He has one of the highest floors in the NBA Draft."
Markkanen, a native of Finland, made 69 three-pointers on the year and shot 42-percent from behind the three-point stripe.
In DraftExpress' latest mock draft, Markkanen is slotted to go No. 8 overall.