By CHARLIE PARENT Longtime Purdue center Trevion Williams officially declared for the NBA Draft on Friday via Instagram. View this post on Instagram A post shared by Trevion Williams | treyway | (@__.sensational.__) Williams contributed in all four seasons at Purdue, putting up 10.8 points per game on 53.1% shooting throughout his career. He is likely to be a second round selection. Follow Charlie on Twitter Follow Adam Zagoria on Twitter Follow ZAGSBLOGHoops on Instagram And Like ZAGS on Facebook