Thought it would help to make one catch-all thread for draft prospects as they make their decisions to leave early or stay another year. Here's a non-comprehensive list of what I've seen - feel free to add to it or post new announcements as they come:
Declared for Draft
Andrew Wiggins, Kansas
Joel Embiid, Kansas
Jabari Parker, Duke
Dante Exum, Australia
Julius Randle, Kentucky
Aaron Gordon, Arizona
Noah Vonleh, Indiana
Marcus Smart, Ok St
Tyler Ennis, Syracuse
Gary Harris, Michigan St
Rodney Hood, Duke
Jerami Grant, Syracuse
TJ Warren, NC State
Kyle Anderson, UCLA
Nik Stauskas, Michigan
James Young, Kentucky
Isiaih Austin, Baylor
Nick Johnson, Arizona
Elfrid Payton, Lousiana-Lafayette
Clint Capela, Switzerland
LaQuinton Ross, Ohio St
Zach LaVine, UCLA
Spencer Dinwiddie, Colorado
James Michael McAdoo, North Carolina
Mitch McGary, Michigan
Glenn Robinson III, Michigan
Jordan Clarkson, Missouri
Jordan Adams, UCLA
Mouhammadou Jaiteh, France
Jabari Brown, Missouri
Isaiah Austin, Baylor
Johnny O'Bryant III, LSU
Jarnell Stokes, Tennessee
Semaj Christon, Xavier
Moses Ayegba, Georgetown
JaKarr Sampson, St John's
Jahii Carson, Arizona St
Roscoe Smith, UNLV
Alex Kirk, New Mexico
Khem Birch, UNLV
Staying in School
Marcus Paige, North Carolina
Wayne Selden, Kansas
Delon Wright, Utah
Ron Baker, Wichita St
Aaron Bowen, Georgetown
Joseph Young, Oregon
Montrezl Harrell, Louisville
Willie Cauley-Stein, Kentucky
Branden Dawson, Michigan St
Rondae Hollis-Jefferson, Arizona
Kaleb Tarczewski, Arizona
Jordan Adams, UCLA
Alex Poythress, Kentucky
Dakari Johnson, Kentucky
Both Harrison twins, Kentucky
Frank Kaminsky, Wisconsin
Dario Saric
Dario Saric