"I would never want my son to play for Boston after what they done to Isaiah Thomas," Anthony Sr. told ESPN's Ramona Shelburne. "No loyalty. Guy gives his heart and soul and they traded him."
He added: "This is just my opinion, not Anthony's. I've just seen things over the years with Boston and there's no loyalty."
Thomas was admittedly hurt by the trade to the Cleveland Cavaliers a few months after helping the Celtics reach the Eastern Conference finals despite suffering a hip injury, which has continued to plague him.
The 5-foot-9 guard signed with the Denver Nuggets last summer but has yet to debut this season.
The Celtics are among the rumored suitors for Davis' services but are unable to land the superstar until the summer due to contractual complications.