Joe Negri, the actor and musician who delighted children for more than three decades on Mister Rogers' Neighborhood, has died at 99. Negri died Saturday, just days before he would have turned 100 on June 10, according to TribLive. His oldest daughter, Lisa Negri, confirmed to the publication that he died of natural causes, though his exact cause of death has not yet been revealed. Negri, who appeared on Mister Rogers' Neighborhood as Handyman Negri, is credited with appearing on 331 episodes of the show from the year of its debut, 1968, to the end of its run in 2001....