He provided a message to fans on the team's official Twitter account:
Duke Basketball @DukeMBB
G: "Gonna miss these guys at Duke next year, but we'll have a nice squad though." 🍿👀🔵😈 #TheBrotherhood https://t.co/dsjXAPZYkC4/18/2017, 8:15:17 PM
Luke Kennard, Jayson Tatum and Harry Giles have all declared for the draft from the Blue Devils.
Allen will try to rebuild his draft stock after a disappointing 2016-17 season. After averaging 21.6 points per game on 46.6 percent shooting from the field as a sophomore, he struggled during his junior year with just 14.5 ppg and a field-goal percentage of 39.6.
The preseason ACC Player of the Year wasn't even named to one of the postseason All-ACC teams.
He also dealt with disciplinary issues when he was suspended for multiple incidents of tripping opponents on the court.
While he was a potential first-round pick in the 2016 draft, he wouldn't be a guaranteed selection in either round this year. DraftExpress currently lists him as the No. 45 overall player available.
However, with 1,424 career points, a national championship and an ACC tournament title already on his resume, Allen has a chance to become an all-time Duke great.
For more news, rumors and related stories about Grayson Allen, Duke and college basketball, check out the CBB and Duke streams on Bleacher Report's app.