Celtics just signed Ron Harper Jr. to a long-term extension

BOSTON, MA - APRIL 12: Ron Harper Jr. #13 of the Boston Celtics during the game against the Orlando Magic at TD Garden on April 12, 2026 in Boston, Massachusetts. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and/or using this Photograph, user is consenting to the terms and conditions of the Getty Images License Agreement. (Photo By Winslow Townson/Getty Images) | Getty Images The Celtics have signed Ron Harper Jr. to a three-year, $9 million contract, ESPN’s Sh