COLUMBUS, Ohio—With the worst season in Knicks’ history crawling to a close and the NCAA tournament getting under way, things are taking shape at the tops of mock NBA Draft boards.

Many analysts expect freshmen centers Jahlil Okafor (Duke) and Karl-Anthony Towns (Kentucky) to be the top two picks, should both enter the June 25 draft. If the Knicks, who are headed to the draft lottery with their NBA-worst record, are fortunate enough to select within that range, they could easily take one of them, given how important good post...