Report: Jackson Jr. comfortable with Grizzlies possibly drafting at No. 4

Jaren Jackson Jr. has had a change of heart.

The Michigan State big man provided the Memphis Grizzlies with his requisite personal information, and has grown comfortable with the potential of being selected fourth overall by the franchise in Thursday's NBA draft, league sources told ESPN's Adrian Wojnarowski.

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Jackson Jr. had refused to work out for Memphis heading into the draft and didn't offer up his medicals to the organization, ESPN's Jonathan Givony reported Tuesday.

ESPN's Adrian Wojnarowski reports that the Grizzlies are likely to select the 18-year-old, which could explain his newfound willingness to comply.

Jackson Jr. was the Big Ten Defensive Player of the Year, averaging 10.9 points, 5.8 rebounds, and three blocks during his Freshman season.